What is a 24-digit number?

A 24-digit number is a number that has 24 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 24-digit number? What is the largest 24-digit number? How many 24-digit numbers are there?

Smallest 24-digit number
The smallest 24-digit number is 1 followed by 23 zeros. This number is called one hundred sextillion.

Largest 24-digit number
The largest 24-digit number is 9 followed by another 23 nines. This number is called nine hundred ninety-nine sextillion nine hundred ninety-nine quintillion nine hundred 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 24-digit numbers
There are a total of nine hundred sextillion different 24-digit numbers. nine hundred sextillion is 9 followed by 23 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 25-digit number?
Go here for information about the next digit number on our list that we have information about.