What is a 17-digit number?

A 17-digit number is a number that has 17 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 17-digit number? What is the largest 17-digit number? How many 17-digit numbers are there?

Smallest 17-digit number
The smallest 17-digit number is 1 followed by 16 zeros. This number is called ten quadrillion.

Largest 17-digit number
The largest 17-digit number is 9 followed by another 16 nines. This number is called ninety-nine quadrillion nine hundred ninety-nine trillion nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine.

Total number of 17-digit numbers
There are a total of ninety quadrillion different 17-digit numbers. ninety quadrillion is 9 followed by 16 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 18-digit number?
Go here for information about the next digit number on our list that we have information about.