21,328
21,328 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 96
- Digital root
- 7
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 82,312
- Recamán's sequence
- a(41,183) = 21,328
- Square (n²)
- 454,883,584
- Cube (n³)
- 9,701,757,079,552
- Divisor count
- 20
- σ(n) — sum of divisors
- 43,648
- φ(n) — Euler's totient
- 10,080
- Sum of prime factors
- 82
Primality
Prime factorization: 2 4 × 31 × 43
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand three hundred twenty-eight
- Ordinal
- 21328th
- Binary
- 101001101010000
- Octal
- 51520
- Hexadecimal
- 0x5350
- Base64
- U1A=
- One's complement
- 44,207 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κατκηʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋦·𝋨
- Chinese
- 二萬一千三百二十八
- Chinese (financial)
- 貳萬壹仟參佰貳拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,328 = 6
- e — Euler's number (e)
- Digit 21,328 = 5
- φ — Golden ratio (φ)
- Digit 21,328 = 8
- √2 — Pythagoras's (√2)
- Digit 21,328 = 3
- ln 2 — Natural log of 2
- Digit 21,328 = 4
- γ — Euler-Mascheroni (γ)
- Digit 21,328 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21328, here are decompositions:
- 5 + 21323 = 21328
- 11 + 21317 = 21328
- 59 + 21269 = 21328
- 101 + 21227 = 21328
- 107 + 21221 = 21328
- 137 + 21191 = 21328
- 149 + 21179 = 21328
- 179 + 21149 = 21328
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8D 90 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.80.
- Address
- 0.0.83.80
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.80
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21328 first appears in π at position 37,647 of the decimal expansion (the 37,647ordinal-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.