21,424
21,424 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 64
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 42,412
- Recamán's sequence
- a(40,991) = 21,424
- Square (n²)
- 458,987,776
- Cube (n³)
- 9,833,354,113,024
- Divisor count
- 20
- σ(n) — sum of divisors
- 45,136
- φ(n) — Euler's totient
- 9,792
- Sum of prime factors
- 124
Primality
Prime factorization: 2 4 × 13 × 103
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand four hundred twenty-four
- Ordinal
- 21424th
- Binary
- 101001110110000
- Octal
- 51660
- Hexadecimal
- 0x53B0
- Base64
- U7A=
- One's complement
- 44,111 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καυκδʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋫·𝋤
- Chinese
- 二萬一千四百二十四
- Chinese (financial)
- 貳萬壹仟肆佰貳拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,424 = 7
- e — Euler's number (e)
- Digit 21,424 = 3
- φ — Golden ratio (φ)
- Digit 21,424 = 9
- √2 — Pythagoras's (√2)
- Digit 21,424 = 5
- ln 2 — Natural log of 2
- Digit 21,424 = 8
- γ — Euler-Mascheroni (γ)
- Digit 21,424 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21424, here are decompositions:
- 5 + 21419 = 21424
- 17 + 21407 = 21424
- 23 + 21401 = 21424
- 41 + 21383 = 21424
- 47 + 21377 = 21424
- 83 + 21341 = 21424
- 101 + 21323 = 21424
- 107 + 21317 = 21424
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8E B0 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.176.
- Address
- 0.0.83.176
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.176
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21424 first appears in π at position 454,579 of the decimal expansion (the 454,579ordinal-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.