18,000
18,000 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 9
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 81
- Flips to (rotate 180°)
- 81
- Recamán's sequence
- a(8,160) = 18,000
- Square (n²)
- 324,000,000
- Cube (n³)
- 5,832,000,000,000
- Divisor count
- 60
- σ(n) — sum of divisors
- 62,868
- φ(n) — Euler's totient
- 4,800
- Sum of prime factors
- 29
Primality
Prime factorization: 2 4 × 3 2 × 5 3
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eighteen thousand
- Ordinal
- 18000th
- Binary
- 100011001010000
- Octal
- 43120
- Hexadecimal
- 0x4650
- Base64
- RlA=
- One's complement
- 47,535 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 · ·
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼
- Greek (Milesian)
- ͵ιη
- Mayan (base 20)
- 𝋢·𝋥·𝋠·𝋠
- Chinese
- 一萬八千
- Chinese (financial)
- 壹萬捌仟
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,000 = 6
- e — Euler's number (e)
- Digit 18,000 = 0
- φ — Golden ratio (φ)
- Digit 18,000 = 2
- √2 — Pythagoras's (√2)
- Digit 18,000 = 2
- ln 2 — Natural log of 2
- Digit 18,000 = 0
- γ — Euler-Mascheroni (γ)
- Digit 18,000 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 18000, here are decompositions:
- 11 + 17989 = 18000
- 13 + 17987 = 18000
- 19 + 17981 = 18000
- 23 + 17977 = 18000
- 29 + 17971 = 18000
- 41 + 17959 = 18000
- 43 + 17957 = 18000
- 61 + 17939 = 18000
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 99 90 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.80.
- Address
- 0.0.70.80
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.80
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 18000 first appears in π at position 80,763 of the decimal expansion (the 80,763ordinal-suffix:rd 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.