18,018
18,018 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 81,081
- Flips to (rotate 180°)
- 81,081
- Recamán's sequence
- a(8,124) = 18,018
- Square (n²)
- 324,648,324
- Cube (n³)
- 5,849,513,501,832
- Divisor count
- 48
- σ(n) — sum of divisors
- 52,416
- φ(n) — Euler's totient
- 4,320
- Sum of prime factors
- 39
Primality
Prime factorization: 2 × 3 2 × 7 × 11 × 13
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eighteen thousand eighteen
- Ordinal
- 18018th
- Binary
- 100011001100010
- Octal
- 43142
- Hexadecimal
- 0x4662
- Base64
- RmI=
- One's complement
- 47,517 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 · 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιηιηʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋠·𝋲
- Chinese
- 一萬八千零一十八
- Chinese (financial)
- 壹萬捌仟零壹拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,018 = 0
- e — Euler's number (e)
- Digit 18,018 = 3
- φ — Golden ratio (φ)
- Digit 18,018 = 7
- √2 — Pythagoras's (√2)
- Digit 18,018 = 8
- ln 2 — Natural log of 2
- Digit 18,018 = 4
- γ — Euler-Mascheroni (γ)
- Digit 18,018 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 18018, here are decompositions:
- 5 + 18013 = 18018
- 29 + 17989 = 18018
- 31 + 17987 = 18018
- 37 + 17981 = 18018
- 41 + 17977 = 18018
- 47 + 17971 = 18018
- 59 + 17959 = 18018
- 61 + 17957 = 18018
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 99 A2 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.98.
- Address
- 0.0.70.98
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.98
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 18018 first appears in π at position 59,823 of the decimal expansion (the 59,823ordinal-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.