Any number which is greater than or equal to 10^12 is 13 digit number.
58
58
Seven and thirteen twentieths, or in digits: 7 13/20
65
13
To write the number in digits, you would write it like this: 95,032,659,004.
8,400,000.00
for new account its 13 digits...
Two.
65
99
There is only one possible combination of a 13 digit number created from 13 digits. In a combination, the order of the digits does not matter so that 123 is the same as 132 or 312 etc. If there are 13 different digits (characters) there is 1 combination of 13 digits 13 combinations of 1 or of 12 digits 78 combinations of 2 or of 11 digits and so on There are 213 - 1 = 8191 in all. If the characters are not all different it is necessary to have more information.