Live analysis
18,001
18,001 is a composite number, odd.
This number doesn't have a permanent NumberWiki page yet — what you see below is computed live.
Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 10
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 10,081
- Flips to (rotate 180°)
- 10,081
- Recamán's sequence
- a(8,158) = 18,001
- Square (n²)
- 324,036,001
- Cube (n³)
- 5,832,972,054,001
- Divisor count
- 4
- σ(n) — sum of divisors
- 18,432
- φ(n) — Euler's totient
- 17,572
- Sum of prime factors
- 430
Primality
Prime factorization: 47 × 383
Divisors & multiples
Aliquot sum (sum of proper divisors):
431
First multiples
18,001
·
36,002
(double)
·
54,003
·
72,004
·
90,005
·
108,006
·
126,007
·
144,008
·
162,009
·
180,010
Sums & aliquot sequence
As consecutive integers:
9,000 + 9,001
360 + 361 + … + 406
145 + 146 + … + 238
Aliquot sequence:
18,001 → 431 → 1 → 0
— terminates at zero
Representations
- In words
- eighteen thousand one
- Ordinal
- 18001st
- Binary
- 100011001010001
- Octal
- 43121
- Hexadecimal
- 0x4651
- Base64
- RlE=
- One's complement
- 47,534 (16-bit)
In other bases
ternary (3)
220200201
quaternary (4)
10121101
quinary (5)
1034001
senary (6)
215201
septenary (7)
103324
nonary (9)
26621
undecimal (11)
12585
duodecimal (12)
a501
tridecimal (13)
8269
tetradecimal (14)
67bb
pentadecimal (15)
5501
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 · 𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺
- Greek (Milesian)
- ͵ιηαʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋠·𝋡
- Chinese
- 一萬八千零一
- Chinese (financial)
- 壹萬捌仟零壹
In other modern scripts
Eastern Arabic
١٨٠٠١
Devanagari
१८००१
Bengali
১৮০০১
Tamil
௧௮௦௦௧
Thai
๑๘๐๐๑
Tibetan
༡༨༠༠༡
Khmer
១៨០០១
Lao
໑໘໐໐໑
Burmese
၁၈၀၀၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,001 = 4
- e — Euler's number (e)
- Digit 18,001 = 9
- φ — Golden ratio (φ)
- Digit 18,001 = 5
- √2 — Pythagoras's (√2)
- Digit 18,001 = 6
- ln 2 — Natural log of 2
- Digit 18,001 = 3
- γ — Euler-Mascheroni (γ)
- Digit 18,001 = 7
Also seen as
Unicode codepoint
䙑
CJK Unified Ideograph-4651
U+4651
Other letter (Lo)
UTF-8 encoding: E4 99 91 (3 bytes).
Hex color
#004651
RGB(0, 70, 81)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.81.
- Address
- 0.0.70.81
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.81
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 18001 first appears in π at position 78,111 of the decimal expansion (the 78,111ordinal-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.