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: [-2.926, 21, 5.541, 7, 86, 4.94, -13.649, -36.905, 57, -20.766]

[21, 7, 86, 57]