What is a 10-digit number?

A 10-digit number is a number that has 10 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 10-digit number? What is the largest 10-digit number? How many 10-digit numbers are there?

Smallest 10-digit number
The smallest 10-digit number is 1 followed by 9 zeros. This number is called one billion.

Largest 10-digit number
The largest 10-digit number is 9 followed by another 9 nines. This number is called nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine.

Total number of 10-digit numbers
There are a total of nine billion different 10-digit numbers. nine billion is 9 followed by 9 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 11-digit number?
Go here for information about the next digit number on our list that we have information about.