Non-Palindromic Numbers are Coolest

OK so this is not a palindromic number but it's way cooler than any palidromic number you can think of. 202 and 1,234,321 are palindromic numbers but they are exceedingly boring. If you reverse a palindromic number and subtract it from itself the difference is always 0.

But....... if you do the same with a non-palindromic number something amazing always happens. The sum of the digits in the difference always equals 9. In this example 3 + 6 + 6 + 3 = 18 and 1 + 8 = 9. This happens for absolutely any non-palindromic number. 7,829,572 and 2759287. The difference is 5070285 which gives a digit total of 27 which
                                                                    together equal 9.