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.
[5, -63.869, 35, -88, 59.323, 18.967, -3.371, 8.278, 20.894]