18,009
18,009 is a composite number, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 90,081
- Flips to (rotate 180°)
- 60,081
- Recamán's sequence
- a(8,142) = 18,009
- Square (n²)
- 324,324,081
- Cube (n³)
- 5,840,752,374,729
- Divisor count
- 16
- σ(n) — sum of divisors
- 28,800
- φ(n) — Euler's totient
- 11,088
- Sum of prime factors
- 61
Primality
Prime factorization: 3 3 × 23 × 29
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eighteen thousand nine
- Ordinal
- 18009th
- Binary
- 100011001011001
- Octal
- 43131
- Hexadecimal
- 0x4659
- Base64
- Rlk=
- One's complement
- 47,526 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 · 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιηθʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋠·𝋩
- Chinese
- 一萬八千零九
- Chinese (financial)
- 壹萬捌仟零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,009 = 9
- e — Euler's number (e)
- Digit 18,009 = 1
- φ — Golden ratio (φ)
- Digit 18,009 = 6
- √2 — Pythagoras's (√2)
- Digit 18,009 = 4
- ln 2 — Natural log of 2
- Digit 18,009 = 1
- γ — Euler-Mascheroni (γ)
- Digit 18,009 = 0
Also seen as
UTF-8 encoding: E4 99 99 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.89.
- Address
- 0.0.70.89
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.89
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 18009 first appears in π at position 136,696 of the decimal expansion (the 136,696ordinal-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.