How many digits are there in the number

*N*if*N*= 2^{13}· 5^{9}?*N*= 2

^{13}· 5

^{9}= 2

^{4}· 2

^{9}· 5

^{9}= 2

^{4}· 10

^{9}= 16 · 10

^{9}= 1.6 x 10

^{10}which has 11 digits.

How many digits are there in the number *N* if *N* = 2^{13} · 5^{9}?