21,704
21,704 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 40,712
- Recamán's sequence
- a(40,431) = 21,704
- Square (n²)
- 471,063,616
- Cube (n³)
- 10,223,964,721,664
- Divisor count
- 8
- σ(n) — sum of divisors
- 40,710
- φ(n) — Euler's totient
- 10,848
- Sum of prime factors
- 2,719
Primality
Prime factorization: 2 3 × 2713
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand seven hundred four
- Ordinal
- 21704th
- Binary
- 101010011001000
- Octal
- 52310
- Hexadecimal
- 0x54C8
- Base64
- VMg=
- One's complement
- 43,831 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καψδʹ
- Mayan (base 20)
- 𝋢·𝋮·𝋥·𝋤
- Chinese
- 二萬一千七百零四
- Chinese (financial)
- 貳萬壹仟柒佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,704 = 9
- e — Euler's number (e)
- Digit 21,704 = 0
- φ — Golden ratio (φ)
- Digit 21,704 = 4
- √2 — Pythagoras's (√2)
- Digit 21,704 = 0
- ln 2 — Natural log of 2
- Digit 21,704 = 9
- γ — Euler-Mascheroni (γ)
- Digit 21,704 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21704, here are decompositions:
- 3 + 21701 = 21704
- 31 + 21673 = 21704
- 43 + 21661 = 21704
- 103 + 21601 = 21704
- 127 + 21577 = 21704
- 181 + 21523 = 21704
- 211 + 21493 = 21704
- 223 + 21481 = 21704
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 93 88 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.84.200.
- Address
- 0.0.84.200
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.84.200
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.
The digit sequence 21704 first appears in π at position 10,175 of the decimal expansion (the 10,175ordinal-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.