0
0 is a number representing an empty quantity. Adding 0 to any number leaves that number unchanged. In mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and complex numbers, as well as other... Wikipedia
Million numbers: six zeros
Arabic, Kurdish, Persian, Sindhi, Urdu: ٠
Assamese, Bengali: ০
Binary: 02
Cardinal: 0, zero, "oh" (/oʊ/), nought, naught, nil
Chinese: 零, 〇
Hindu numerals: ०