18,607 18,606 18,608
name the numeral comes before the given cardinals number 2599 2598
18606, 18608
9998
The idea is to subtract 1 from that number.
There is no such number because the given numerals are an invalid arrangement of Roman numerals
Surname comes after their given name.
That depends on what Roman numerals of which none has been given.
2598
2598
It is 9998.
9998
8408