Q: What is the negative version of the number 21,561,819?
A: -21,561,819
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:
| 21,561,817 | 21,561,818 | 21,561,820 | 21,561,821 |
| -21,561,817 | -21,561,818 | -21,561,820 | -21,561,821 |