21,136
21,136 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 36
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 63,112
- Recamán's sequence
- a(41,567) = 21,136
- Square (n²)
- 446,730,496
- Cube (n³)
- 9,442,095,763,456
- Divisor count
- 10
- σ(n) — sum of divisors
- 40,982
- φ(n) — Euler's totient
- 10,560
- Sum of prime factors
- 1,329
Primality
Prime factorization: 2 4 × 1321
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand one hundred thirty-six
- Ordinal
- 21136th
- Binary
- 101001010010000
- Octal
- 51220
- Hexadecimal
- 0x5290
- Base64
- UpA=
- One's complement
- 44,399 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καρλϛʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋰·𝋰
- Chinese
- 二萬一千一百三十六
- Chinese (financial)
- 貳萬壹仟壹佰參拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,136 = 4
- e — Euler's number (e)
- Digit 21,136 = 7
- φ — Golden ratio (φ)
- Digit 21,136 = 4
- √2 — Pythagoras's (√2)
- Digit 21,136 = 9
- ln 2 — Natural log of 2
- Digit 21,136 = 6
- γ — Euler-Mascheroni (γ)
- Digit 21,136 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21136, here are decompositions:
- 29 + 21107 = 21136
- 47 + 21089 = 21136
- 113 + 21023 = 21136
- 173 + 20963 = 21136
- 197 + 20939 = 21136
- 233 + 20903 = 21136
- 239 + 20897 = 21136
- 257 + 20879 = 21136
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8A 90 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.144.
- Address
- 0.0.82.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.144
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21136 first appears in π at position 97,828 of the decimal expansion (the 97,828ordinal-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.