Step 1: Divide the number into separate digits:
46634 => 4 6 6 3 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
4 to 6 = 2
6 to 6 = 0
6 to 3 = 3
3 to 4 = 1
4 to 4 = 0
Step 3: Combine the filters to a string:
2 0 3 1 0 = 20310