1000000000000000000

This article is about the SI prefix. For the X Window System acceleration architecture, see EXA. exa- (symbol E) is a prefix in the SI system of units denoting 10¹⁸ or 1 000 000 000 000 000 000.Adopted in 1991, it comes from the Greek ἕξ, meaning six (like ), because it is equal to 10006.Examples:1 EeV = 1018 electronvolts = 0.1602 jouleexasecondexametre
See more at Wikipedia.org...