21,104
21,104 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 40,112
- Recamán's sequence
- a(41,631) = 21,104
- Square (n²)
- 445,378,816
- Cube (n³)
- 9,399,274,532,864
- Divisor count
- 10
- σ(n) — sum of divisors
- 40,920
- φ(n) — Euler's totient
- 10,544
- Sum of prime factors
- 1,327
Primality
Prime factorization: 2 4 × 1319
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand one hundred four
- Ordinal
- 21104th
- Binary
- 101001001110000
- Octal
- 51160
- Hexadecimal
- 0x5270
- Base64
- UnA=
- One's complement
- 44,431 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵καρδʹ
- Mayan (base 20)
- 𝋢·𝋬·𝋯·𝋤
- Chinese
- 二萬一千一百零四
- Chinese (financial)
- 貳萬壹仟壹佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,104 = 1
- e — Euler's number (e)
- Digit 21,104 = 1
- φ — Golden ratio (φ)
- Digit 21,104 = 0
- √2 — Pythagoras's (√2)
- Digit 21,104 = 5
- ln 2 — Natural log of 2
- Digit 21,104 = 9
- γ — Euler-Mascheroni (γ)
- Digit 21,104 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21104, here are decompositions:
- 3 + 21101 = 21104
- 37 + 21067 = 21104
- 43 + 21061 = 21104
- 73 + 21031 = 21104
- 103 + 21001 = 21104
- 157 + 20947 = 21104
- 331 + 20773 = 21104
- 373 + 20731 = 21104
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 89 B0 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.112.
- Address
- 0.0.82.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.82.112
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21104 first appears in π at position 73,956 of the decimal expansion (the 73,956ordinal-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.