Q: What is the negative version of the number 21,615,663?
A: -21,615,663
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:
| 21,615,661 | 21,615,662 | 21,615,664 | 21,615,665 |
| -21,615,661 | -21,615,662 | -21,615,664 | -21,615,665 |