21,996
21,996 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 27
- Digit product
- 972
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 69,912
- Recamán's sequence
- a(167,771) = 21,996
- Square (n²)
- 483,824,016
- Cube (n³)
- 10,642,193,055,936
- Divisor count
- 36
- σ(n) — sum of divisors
- 61,152
- φ(n) — Euler's totient
- 6,624
- Sum of prime factors
- 70
Primality
Prime factorization: 2 2 × 3 2 × 13 × 47
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand nine hundred ninety-six
- Ordinal
- 21996th
- Binary
- 101010111101100
- Octal
- 52754
- Hexadecimal
- 0x55EC
- Base64
- Vew=
- One's complement
- 43,539 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καϡϟϛʹ
- Mayan (base 20)
- 𝋢·𝋮·𝋳·𝋰
- Chinese
- 二萬一千九百九十六
- Chinese (financial)
- 貳萬壹仟玖佰玖拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,996 = 6
- e — Euler's number (e)
- Digit 21,996 = 6
- φ — Golden ratio (φ)
- Digit 21,996 = 5
- √2 — Pythagoras's (√2)
- Digit 21,996 = 2
- ln 2 — Natural log of 2
- Digit 21,996 = 1
- γ — Euler-Mascheroni (γ)
- Digit 21,996 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21996, here are decompositions:
- 5 + 21991 = 21996
- 19 + 21977 = 21996
- 53 + 21943 = 21996
- 59 + 21937 = 21996
- 67 + 21929 = 21996
- 103 + 21893 = 21996
- 137 + 21859 = 21996
- 157 + 21839 = 21996
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 97 AC (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.85.236.
- Address
- 0.0.85.236
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.85.236
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21996 first appears in π at position 116,701 of the decimal expansion (the 116,701ordinal-suffix:st 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.