21,426
21,426 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 15
- Digit product
- 96
- Digital root
- 6
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 62,412
- Recamán's sequence
- a(40,987) = 21,426
- Square (n²)
- 459,073,476
- Cube (n³)
- 9,836,108,296,776
- Divisor count
- 8
- σ(n) — sum of divisors
- 42,864
- φ(n) — Euler's totient
- 7,140
- Sum of prime factors
- 3,576
Primality
Prime factorization: 2 × 3 × 3571
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand four hundred twenty-six
- Ordinal
- 21426th
- Binary
- 101001110110010
- Octal
- 51662
- Hexadecimal
- 0x53B2
- Base64
- U7I=
- One's complement
- 44,109 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καυκϛʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋫·𝋦
- Chinese
- 二萬一千四百二十六
- Chinese (financial)
- 貳萬壹仟肆佰貳拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,426 = 7
- e — Euler's number (e)
- Digit 21,426 = 2
- φ — Golden ratio (φ)
- Digit 21,426 = 0
- √2 — Pythagoras's (√2)
- Digit 21,426 = 4
- ln 2 — Natural log of 2
- Digit 21,426 = 6
- γ — Euler-Mascheroni (γ)
- Digit 21,426 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21426, here are decompositions:
- 7 + 21419 = 21426
- 19 + 21407 = 21426
- 29 + 21397 = 21426
- 43 + 21383 = 21426
- 47 + 21379 = 21426
- 79 + 21347 = 21426
- 103 + 21323 = 21426
- 107 + 21319 = 21426
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8E B2 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.178.
- Address
- 0.0.83.178
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.178
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21426 first appears in π at position 43,638 of the decimal expansion (the 43,638ordinal-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.