18,040
18,040 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 4,081
- Recamán's sequence
- a(15,976) = 18,040
- Square (n²)
- 325,441,600
- Cube (n³)
- 5,870,966,464,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 45,360
- φ(n) — Euler's totient
- 6,400
- Sum of prime factors
- 63
Primality
Prime factorization: 2 3 × 5 × 11 × 41
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eighteen thousand forty
- Ordinal
- 18040th
- Binary
- 100011001111000
- Octal
- 43170
- Hexadecimal
- 0x4678
- Base64
- Rng=
- One's complement
- 47,495 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 · 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ιημʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋢·𝋠
- Chinese
- 一萬八千零四十
- Chinese (financial)
- 壹萬捌仟零肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,040 = 4
- e — Euler's number (e)
- Digit 18,040 = 4
- φ — Golden ratio (φ)
- Digit 18,040 = 5
- √2 — Pythagoras's (√2)
- Digit 18,040 = 3
- ln 2 — Natural log of 2
- Digit 18,040 = 2
- γ — Euler-Mascheroni (γ)
- Digit 18,040 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 18040, here are decompositions:
- 53 + 17987 = 18040
- 59 + 17981 = 18040
- 83 + 17957 = 18040
- 101 + 17939 = 18040
- 131 + 17909 = 18040
- 137 + 17903 = 18040
- 149 + 17891 = 18040
- 233 + 17807 = 18040
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 99 B8 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.120.
- Address
- 0.0.70.120
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.120
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 18040 first appears in π at position 55,101 of the decimal expansion (the 55,101ordinal-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.