Live analysis

21,007

21,007 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.).

Deficient Number Squarefree

Properties

Parity: Odd
Digit count: 5
Digit sum: 10
Digital root: 1
Palindrome: No
Divisor count: 4
σ(n) — sum of divisors: 24,016

Primality

Prime factorization: 7 × 3001

Divisors & multiples

All divisors (4)

1 · 7 · 3001 · 21007

Aliquot sum (sum of proper divisors): 3,009

Factor pairs (a × b = 21,007)

1 × 21007

7 × 3001

First multiples

21,007 · 42,014 · 63,021 · 84,028 · 105,035 · 126,042 · 147,049 · 168,056 · 189,063 · 210,070

Representations

In words: twenty-one thousand seven
Ordinal: 21007th
Binary: 101001000001111
Octal: 51017
Hexadecimal: 520F

Also seen as

Unicode codepoint

刏

U+520F

Other letter (Lo)

UTF-8 encoding: E5 88 8F (3 bytes).

Lookup U+520F on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00520F

RGB(0, 82, 15)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.15.