Number
20,021
20,021 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 5
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 12,002
- Square (n²)
- 400,840,441
- Cube (n³)
- 8,025,226,469,261
- Divisor count
- 2
- σ(n) — sum of divisors
- 20,022
- φ(n) — Euler's totient
- 20,020
Primality
20,021 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
20,021
·
40,042
(double)
·
60,063
·
80,084
·
100,105
·
120,126
·
140,147
·
160,168
·
180,189
·
200,210
Sums & aliquot sequence
As a sum of two squares:
89² + 110²
As consecutive integers:
10,010 + 10,011
Representations
- In words
- twenty thousand twenty-one
- Ordinal
- 20021st
- Binary
- 100111000110101
- Octal
- 47065
- Hexadecimal
- 0x4E35
- Base64
- TjU=
- One's complement
- 45,514 (16-bit)
In other bases
ternary (3)
1000110112
quaternary (4)
10320311
quinary (5)
1120041
senary (6)
232405
septenary (7)
112241
nonary (9)
30415
undecimal (11)
14051
duodecimal (12)
b705
tridecimal (13)
9161
tetradecimal (14)
7421
pentadecimal (15)
5deb
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓎆𓎆𓏺
- Greek (Milesian)
- ͵κκαʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋡·𝋡
- Chinese
- 二萬零二十一
- Chinese (financial)
- 貳萬零貳拾壹
In other modern scripts
Eastern Arabic
٢٠٠٢١
Devanagari
२००२१
Bengali
২০০২১
Tamil
௨௦௦௨௧
Thai
๒๐๐๒๑
Tibetan
༢༠༠༢༡
Khmer
២០០២១
Lao
໒໐໐໒໑
Burmese
၂၀၀၂၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,021 = 4
- e — Euler's number (e)
- Digit 20,021 = 8
- φ — Golden ratio (φ)
- Digit 20,021 = 2
- √2 — Pythagoras's (√2)
- Digit 20,021 = 8
- ln 2 — Natural log of 2
- Digit 20,021 = 9
- γ — Euler-Mascheroni (γ)
- Digit 20,021 = 1
Also seen as
Prime neighborhood
Unicode codepoint
丵
CJK Unified Ideograph-4E35
U+4E35
Other letter (Lo)
UTF-8 encoding: E4 B8 B5 (3 bytes).
Hex color
#004E35
RGB(0, 78, 53)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.78.53.
- Address
- 0.0.78.53
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.78.53
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 20021 first appears in π at position 296,470 of the decimal expansion (the 296,470ordinal-suffix:th 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.