Q: What is the negative version of the number 21,513,421?
A: -21,513,421
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:
| 21,513,419 | 21,513,420 | 21,513,422 | 21,513,423 |
| -21,513,419 | -21,513,420 | -21,513,422 | -21,513,423 |