Step 1: Divide the number into separate digits:
58635 => 5 8 6 3 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
5 to 8 = 3
8 to 6 = 2
6 to 3 = 3
3 to 5 = 2
5 to 5 = 0
Step 3: Combine the filters to a string:
3 2 3 2 0 = 32320