21,340
21,340 is a composite number, even.
21,340 (twenty-one thousand three hundred forty) is an even 5-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 11 × 97. Its proper divisors sum to 28,052, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x535C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 4,312
- Recamán's sequence
- a(41,159) = 21,340
- Square (n²)
- 455,395,600
- Cube (n³)
- 9,718,142,104,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 49,392
- φ(n) — Euler's totient
- 7,680
- Sum of prime factors
- 117
Primality
Prime factorization: 2 2 × 5 × 11 × 97
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√21,340 = [146; (12, 5, 1, 7, 3, 1, 1, 3, 26, 3, 1, 1, 3, 7, 1, 5, 12, 292)]
Period length 18 — the block in parentheses repeats forever.
Representations
- In words
- twenty-one thousand three hundred forty
- Ordinal
- 21340th
- Binary
- 101001101011100
- Octal
- 51534
- Hexadecimal
- 0x535C
- Base64
- U1w=
- One's complement
- 44,195 (16-bit)
- Scientific notation
- 2.134 × 10⁴
- As a duration
- 21,340 s = 5 hours, 55 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵κατμʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋧·𝋠
- Chinese
- 二萬一千三百四十
- Chinese (financial)
- 貳萬壹仟參佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,340 = 6
- e — Euler's number (e)
- Digit 21,340 = 2
- φ — Golden ratio (φ)
- Digit 21,340 = 8
- √2 — Pythagoras's (√2)
- Digit 21,340 = 3
- ln 2 — Natural log of 2
- Digit 21,340 = 0
- γ — Euler-Mascheroni (γ)
- Digit 21,340 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21340, here are decompositions:
- 17 + 21323 = 21340
- 23 + 21317 = 21340
- 71 + 21269 = 21340
- 113 + 21227 = 21340
- 149 + 21191 = 21340
- 191 + 21149 = 21340
- 197 + 21143 = 21340
- 233 + 21107 = 21340
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D 9C (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.92.
- Address
- 0.0.83.92
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.92
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21340 first appears in π at position 84,446 of the decimal expansion (the 84,446ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.