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21,060

21,060 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Abundant Number Gapful Number Harshad / Niven Odious Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number

Properties

Parity
Even
Digit count
5
Digit sum
9
Digit product
0
Digital root
9
Palindrome
No
Bit width
15 bits
Reversed
6,012
Recamán's sequence
a(41,719) = 21,060
Square (n²)
443,523,600
Cube (n³)
9,340,607,016,000
Divisor count
60
σ(n) — sum of divisors
71,148
φ(n) — Euler's totient
5,184
Sum of prime factors
34

Primality

Prime factorization: 2 2 × 3 4 × 5 × 13

Nearest primes: 21,059 (−1) · 21,061 (+1)

Divisors & multiples

All divisors (60)
1 · 2 · 3 · 4 · 5 · 6 · 9 · 10 · 12 · 13 · 15 · 18 · 20 · 26 · 27 · 30 · 36 · 39 · 45 · 52 · 54 · 60 · 65 · 78 · 81 · 90 · 108 · 117 · 130 · 135 · 156 · 162 · 180 · 195 · 234 · 260 · 270 · 324 · 351 · 390 · 405 · 468 · 540 · 585 · 702 · 780 · 810 · 1053 · 1170 · 1404 · 1620 · 1755 · 2106 · 2340 · 3510 · 4212 · 5265 · 7020 · 10530 (half) · 21060
Aliquot sum (sum of proper divisors): 50,088
Factor pairs (a × b = 21,060)
1 × 21060
2 × 10530
3 × 7020
4 × 5265
5 × 4212
6 × 3510
9 × 2340
10 × 2106
12 × 1755
13 × 1620
15 × 1404
18 × 1170
20 × 1053
26 × 810
27 × 780
30 × 702
36 × 585
39 × 540
45 × 468
52 × 405
54 × 390
60 × 351
65 × 324
78 × 270
81 × 260
90 × 234
108 × 195
117 × 180
130 × 162
135 × 156
First multiples
21,060 · 42,120 (double) · 63,180 · 84,240 · 105,300 · 126,360 · 147,420 · 168,480 · 189,540 · 210,600

Sums & aliquot sequence

As a sum of two squares: 18² + 144² = 72² + 126²
As consecutive integers: 7,019 + 7,020 + 7,021 4,210 + 4,211 + 4,212 + 4,213 + 4,214 2,629 + 2,630 + … + 2,636 2,336 + 2,337 + … + 2,344
Aliquot sequence: 21,060 50,088 75,192 128,088 228,312 501,288 751,992 1,128,048 1,836,048 3,074,352 5,288,208 8,968,320 23,244,300 51,490,500 98,454,204 158,925,380 181,711,420 — unresolved within range

Representations

In words
twenty-one thousand sixty
Ordinal
21060th
Binary
101001001000100
Octal
51104
Hexadecimal
0x5244
Base64
UkQ=
One's complement
44,475 (16-bit)
In other bases
ternary (3) 1001220000
quaternary (4) 11021010
quinary (5) 1133220
senary (6) 241300
septenary (7) 115254
nonary (9) 31800
undecimal (11) 14906
duodecimal (12) 10230
tridecimal (13) 9780
tetradecimal (14) 7964
pentadecimal (15) 6390

Historical numeral systems

Babylonian (base 60)
𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹 ·
Egyptian hieroglyphic
𓂍𓂍𓆼𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian)
͵καξʹ
Mayan (base 20)
𝋢·𝋬·𝋭·𝋠
Chinese
二萬一千零六十
Chinese (financial)
貳萬壹仟零陸拾
In other modern scripts
Eastern Arabic ٢١٠٦٠ Devanagari २१०६० Bengali ২১০৬০ Tamil ௨௧௦௬௦ Thai ๒๑๐๖๐ Tibetan ༢༡༠༦༠ Khmer ២១០៦០ Lao ໒໑໐໖໐ Burmese ၂၁၀၆၀

Digit at this position in famous constants

π — Pi (π)
Digit 21,060 = 4
e — Euler's number (e)
Digit 21,060 = 1
φ — Golden ratio (φ)
Digit 21,060 = 4
√2 — Pythagoras's (√2)
Digit 21,060 = 5
ln 2 — Natural log of 2
Digit 21,060 = 5
γ — Euler-Mascheroni (γ)
Digit 21,060 = 1

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21060, here are decompositions:

  • 29 + 21031 = 21060
  • 37 + 21023 = 21060
  • 41 + 21019 = 21060
  • 43 + 21017 = 21060
  • 47 + 21013 = 21060
  • 59 + 21001 = 21060
  • 79 + 20981 = 21060
  • 97 + 20963 = 21060

Showing the first eight; more decompositions exist.

Unicode codepoint
CJK Unified Ideograph-5244
U+5244
Other letter (Lo)

UTF-8 encoding: E5 89 84 (3 bytes).

Hex color
#005244
RGB(0, 82, 68)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.68.

Address
0.0.82.68
Class
reserved
IPv4-mapped IPv6
::ffff:0.0.82.68

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Position in π

The digit sequence 21060 first appears in π at position 64,383 of the decimal expansion (the 64,383ordinal-suffix:rd digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.