1,000,000,000,000,000,000
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One less than ten quintillion.
There are eighteen zero's, just like 1 quintillion.1 quintillion: 1,000,000,000,000,000,00013 quintillion: 13,000,000,000,000,000,000
15 zeros
1818 zero's are in a quintillion.
Quintillion has eighteen zeros. 1,000,000,000,000,000,000