21,364
21,364 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 144
- Digital root
- 7
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 46,312
- Recamán's sequence
- a(41,111) = 21,364
- Square (n²)
- 456,420,496
- Cube (n³)
- 9,750,967,476,544
- Divisor count
- 18
- σ(n) — sum of divisors
- 43,890
- φ(n) — Euler's totient
- 9,072
- Sum of prime factors
- 127
Primality
Prime factorization: 2 2 × 7 2 × 109
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand three hundred sixty-four
- Ordinal
- 21364th
- Binary
- 101001101110100
- Octal
- 51564
- Hexadecimal
- 0x5374
- Base64
- U3Q=
- One's complement
- 44,171 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κατξδʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋨·𝋤
- Chinese
- 二萬一千三百六十四
- Chinese (financial)
- 貳萬壹仟參佰陸拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,364 = 8
- e — Euler's number (e)
- Digit 21,364 = 4
- φ — Golden ratio (φ)
- Digit 21,364 = 3
- √2 — Pythagoras's (√2)
- Digit 21,364 = 0
- ln 2 — Natural log of 2
- Digit 21,364 = 2
- γ — Euler-Mascheroni (γ)
- Digit 21,364 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21364, here are decompositions:
- 17 + 21347 = 21364
- 23 + 21341 = 21364
- 41 + 21323 = 21364
- 47 + 21317 = 21364
- 137 + 21227 = 21364
- 173 + 21191 = 21364
- 257 + 21107 = 21364
- 263 + 21101 = 21364
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D B4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.116.
- Address
- 0.0.83.116
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.116
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 21364 first appears in π at position 47,240 of the decimal expansion (the 47,240ordinal-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.