Q: What is the negative version of the number 21,006,409?
A: -21,006,409
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:
| 21,006,407 | 21,006,408 | 21,006,410 | 21,006,411 |
| -21,006,407 | -21,006,408 | -21,006,410 | -21,006,411 |