0:12
1:21
2:20
3:20
4:20
5:20
6:20
7:20
8:20
9:20
As a digit in other numbers it appears 20 times
18
20000 times
A total of 44 times.
18 times
11 times
As a digit in other numbers it appears 20 times
18
18 times
A total of 44 times.
20000 times
200
200
16
Infinitely many.
140
700000