21,076
21,076 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digital root
- 7
- Palindrome
- No
- Reversed
- 67,012
- Divisor count
- 12
- σ(n) — sum of divisors
- 40,320
Primality
Prime factorization: 2 2 × 11 × 479
Divisors & multiples
Representations
- In words
- twenty-one thousand seventy-six
- Ordinal
- 21076th
- Binary
- 101001001010100
- Octal
- 51124
- Hexadecimal
- 0x5254
- Base64
- UlQ=
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21076, here are decompositions:
- 17 + 21059 = 21076
- 53 + 21023 = 21076
- 59 + 21017 = 21076
- 113 + 20963 = 21076
- 137 + 20939 = 21076
- 173 + 20903 = 21076
- 179 + 20897 = 21076
- 197 + 20879 = 21076
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 89 94 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.84.
- Address
- 0.0.82.84
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.84
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.