Live analysis

21,004

21,004 is a composite number, even.

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

Properties

Parity: Even
Digit count: 5
Digit sum: 7
Digital root: 7
Palindrome: No
Divisor count: 12
σ(n) — sum of divisors: 37,800

Primality

Prime factorization: 2 ² × 59 × 89

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 59 · 89 · 118 · 178 · 236 · 356 · 5251 · 10502 · 21004

Aliquot sum (sum of proper divisors): 16,796

Factor pairs (a × b = 21,004)

1 × 21004

2 × 10502

4 × 5251

59 × 356

89 × 236

118 × 178

First multiples

21,004 · 42,008 · 63,012 · 84,016 · 105,020 · 126,024 · 147,028 · 168,032 · 189,036 · 210,040

Representations

In words: twenty-one thousand four
Ordinal: 21004th
Binary: 101001000001100
Octal: 51014
Hexadecimal: 520C

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 21004, here are decompositions:

3 + 21001 = 21004
23 + 20981 = 21004
41 + 20963 = 21004
83 + 20921 = 21004
101 + 20903 = 21004
107 + 20897 = 21004
131 + 20873 = 21004
197 + 20807 = 21004

Showing the first eight; more decompositions exist.

Unicode codepoint

刌

U+520C

Other letter (Lo)

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

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

Hex color

#00520C

RGB(0, 82, 12)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.82.12.