Not sure what the question means.
192 digits can be one very large number or 192 individual integers [0, 1, 2, 3, 4, 5, 6, 7, 8 or 9].
If the digits are all different then 18. Otherwise, 192.
There are 192.
-99
192 digits
192, including ones containing repeat digits.
192 ways
192
101
10 digits are numbers in the billions.
there are 899 whole numbers that have three digits.
525
99999