There is no two digit number which, when added to Y gives Y.
101117
It is called the digit.
199
24
100000 2847239582
101117
It is called the digit.
199
simple program
24
101117
gentleman
100000 2847239582
...you add them up with a calculator to make sure they are correct.
45
The sum is the total of numbers added together.
The root sum is the sum of the digits of a number when repeatedly added together until a single-digit number is reached. For example, the root sum of 123 would be 6 (1+2+3 = 6). It is often used in numerology to derive a single-digit number that represents certain characteristics of the original number.