21,342
21,342 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 12
- Digit product
- 48
- Digital root
- 3
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,312
- Recamán's sequence
- a(41,155) = 21,342
- Square (n²)
- 455,480,964
- Cube (n³)
- 9,720,874,733,688
- Divisor count
- 8
- σ(n) — sum of divisors
- 42,696
- φ(n) — Euler's totient
- 7,112
- Sum of prime factors
- 3,562
Primality
Prime factorization: 2 × 3 × 3557
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand three hundred forty-two
- Ordinal
- 21342nd
- Binary
- 101001101011110
- Octal
- 51536
- Hexadecimal
- 0x535E
- Base64
- U14=
- One's complement
- 44,193 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κατμβʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋧·𝋢
- Chinese
- 二萬一千三百四十二
- Chinese (financial)
- 貳萬壹仟參佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,342 = 0
- e — Euler's number (e)
- Digit 21,342 = 5
- φ — Golden ratio (φ)
- Digit 21,342 = 7
- √2 — Pythagoras's (√2)
- Digit 21,342 = 6
- ln 2 — Natural log of 2
- Digit 21,342 = 3
- γ — Euler-Mascheroni (γ)
- Digit 21,342 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21342, here are decompositions:
- 19 + 21323 = 21342
- 23 + 21319 = 21342
- 29 + 21313 = 21342
- 59 + 21283 = 21342
- 73 + 21269 = 21342
- 131 + 21211 = 21342
- 149 + 21193 = 21342
- 151 + 21191 = 21342
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D 9E (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.94.
- Address
- 0.0.83.94
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.94
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21342 first appears in π at position 95,487 of the decimal expansion (the 95,487ordinal-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.