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: [58, -19.087, -34, -55.436, 74, 3.154, 43.423, 4, 74.689, -20]

[58, -34, 74, 4, -20]