Definition: In this task you will be given a list of numbers. You should remove any number that is not an integer (whole number). If every number is not an whole number then an empty list ("[]") should be returned. Otherwise, answer with the list of whole numbers separated by comma inside brackets.
Input: [-0.946, -48.717, 13.488, 2.897, -29.44, 18, -6.643, 6.068, 8.289, -87, 20]

[18, -87, 20]