21,412
21,412 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 16
- Digital root
- 1
- Palindrome
- Yes
- Bit width
- 15 bits
- Recamán's sequence
- a(41,015) = 21,412
- Square (n²)
- 458,473,744
- Cube (n³)
- 9,816,839,806,528
- Divisor count
- 12
- σ(n) — sum of divisors
- 38,556
- φ(n) — Euler's totient
- 10,400
- Sum of prime factors
- 158
Primality
Prime factorization: 2 2 × 53 × 101
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-one thousand four hundred twelve
- Ordinal
- 21412th
- Binary
- 101001110100100
- Octal
- 51644
- Hexadecimal
- 0x53A4
- Base64
- U6Q=
- One's complement
- 44,123 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓏺𓏺
- Greek (Milesian)
- ͵καυιβʹ
- Mayan (base 20)
- 𝋢·𝋭·𝋪·𝋬
- Chinese
- 二萬一千四百一十二
- Chinese (financial)
- 貳萬壹仟肆佰壹拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 21,412 = 0
- e — Euler's number (e)
- Digit 21,412 = 4
- φ — Golden ratio (φ)
- Digit 21,412 = 4
- √2 — Pythagoras's (√2)
- Digit 21,412 = 0
- ln 2 — Natural log of 2
- Digit 21,412 = 6
- γ — Euler-Mascheroni (γ)
- Digit 21,412 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21412, here are decompositions:
- 5 + 21407 = 21412
- 11 + 21401 = 21412
- 29 + 21383 = 21412
- 71 + 21341 = 21412
- 89 + 21323 = 21412
- 191 + 21221 = 21412
- 233 + 21179 = 21412
- 263 + 21149 = 21412
Showing the first eight; more decompositions exist.
UTF-8 encoding: E5 8E A4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.83.164.
- Address
- 0.0.83.164
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.83.164
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 21412 first appears in π at position 316,267 of the decimal expansion (the 316,267ordinal-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.