Digits in Number in Exponential Form October 30, 2016 at 6:46amAugust 20, 2019 by huggins.5@osu.edu How many digits are there in the number N if N = 213 · 59? Show/Hide Solution N = 213 · 59 = 24 · 29 · 59 = 24 · 109 = 16 · 109 = 1.6 x 1010 which has 11 digits.