Number

0

0 — Zero

0 is even.

Zero is the additive identity of the integers. It is neither positive nor negative, and is the only integer that is neither prime nor composite. The Babylonians used a placeholder for zero by 300 BCE, but its treatment as a true number is generally credited to Indian mathematicians, with Brahmagupta giving the first explicit rules for arithmetic with zero in 628 CE.

Sources https://en.wikipedia.org/wiki/0

Curated Fibonacci Heptagonal Hexagonal Narcissistic / Armstrong Octagonal Pentagonal Perfect Cube Perfect Square Pronic / Oblong Recamán's Sequence Strobogrammatic Triangular

Properties

Parity: Even
Digit count: 1
Digit sum: 0
Digital root: 0
Palindrome: Yes
Bit width: 1 bits
Recamán's sequence: a(0) = 0
Square (n²): 0
Cube (n³): 0
Square root (√n): 0
Cube root (∛n): 0
Divisor count: 1
σ(n) — sum of divisors: 1

Representations

In words: zero
Ordinal: 0th
Binary: 0
Octal: 0
Hexadecimal: 0x0
Base64: AA==
One's complement: 255 (8-bit)

In other bases

ternary (3) 0

quaternary (4) 0

quinary (5) 0

senary (6) 0

septenary (7) 0

nonary (9) 0

undecimal (11) 0

duodecimal (12) 0

tridecimal (13) 0

tetradecimal (14) 0

pentadecimal (15) 0

Historical numeral systems

Mayan (base 20): 𝋠
Chinese: 零
Chinese (financial): 零

In other modern scripts

Eastern Arabic ٠ Devanagari ० Bengali ০ Tamil ௦ Thai ๐ Tibetan ༠ Khmer ០ Lao ໐ Burmese ၀

Also seen as

ASCII character

As an ASCII codepoint, 0 is NUL (null). ASCII control character.

Hex color

#000000

RGB(0, 0, 0)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.0.

Address: 0.0.0.0
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.0

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Geographic coordinate

As a geographic coordinate in degrees, this matches:

Equator (latitude) — 0° latitude — the equator divides the Earth into the Northern and Southern hemispheres.
Prime Meridian (longitude) — 0° longitude — passes through the Royal Observatory at Greenwich, London; the reference for UTC.