Q: What is the negative version of the number 20,721,645?
A: -20,721,645
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:
| 20,721,643 | 20,721,644 | 20,721,646 | 20,721,647 |
| -20,721,643 | -20,721,644 | -20,721,646 | -20,721,647 |