quintillion

(noun, numeral)

noun

1. the number that is represented as a one followed by 18 zeros

Definition categories: quantity

numeral

1. (US, modern British & Australian, short scale) A billion billion: 1 followed by eighteen zeros, 1018.

2. (dated, British & Australian, long scale) A million quadrillion: 1 followed by 30 zeros, 1030.