Q: What is the negative version of the number 21,531,407?
A: -21,531,407
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 21,531,405 | 21,531,406 | 21,531,408 | 21,531,409 |
| -21,531,405 | -21,531,406 | -21,531,408 | -21,531,409 |