20,404
20,404 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 40,402
- Recamán's sequence
- a(86,408) = 20,404
- Square (n²)
- 416,323,216
- Cube (n³)
- 8,494,658,899,264
- Divisor count
- 6
- σ(n) — sum of divisors
- 35,714
- φ(n) — Euler's totient
- 10,200
- Sum of prime factors
- 5,105
Primality
Prime factorization: 2 2 × 5101
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty thousand four hundred four
- Ordinal
- 20404th
- Binary
- 100111110110100
- Octal
- 47664
- Hexadecimal
- 0x4FB4
- Base64
- T7Q=
- One's complement
- 45,131 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κυδʹ
- Mayan (base 20)
- 𝋢·𝋫·𝋠·𝋤
- Chinese
- 二萬零四百零四
- Chinese (financial)
- 貳萬零肆佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 20,404 = 0
- e — Euler's number (e)
- Digit 20,404 = 0
- φ — Golden ratio (φ)
- Digit 20,404 = 1
- √2 — Pythagoras's (√2)
- Digit 20,404 = 9
- ln 2 — Natural log of 2
- Digit 20,404 = 5
- γ — Euler-Mascheroni (γ)
- Digit 20,404 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 20404, here are decompositions:
- 5 + 20399 = 20404
- 11 + 20393 = 20404
- 47 + 20357 = 20404
- 71 + 20333 = 20404
- 107 + 20297 = 20404
- 173 + 20231 = 20404
- 227 + 20177 = 20404
- 257 + 20147 = 20404
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 BE B4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.79.180.
- Address
- 0.0.79.180
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.79.180
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 20404 first appears in π at position 158,898 of the decimal expansion (the 158,898ordinal-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.