Answer is 1 whether 20th or 5th etc power e.g. 1x1x1x1x1 = 1 and so on.
104,857,600,000,000,000,000,000,000
A 20th = 1/20 = 0.05 So 0.0520 = 9.537*10-27 approx.
Yes, Power Rangers will have a 20th anniversary. Power Rangers' 20th anniversary is officially on August 28, 2013 and the current 2013 season of Power Rangers Megaforce is considered to be their 20th anniversary season even though the anniversary aspects won't be shown until the 2nd half of Megaforce which will be called Super Megaforce.
520 = 95,367,431,640,625.
7.97922663x10^16
1.520 = 3325.25673007965087890625
1.5
1
20th century
Twenty.
520 = 95367431640625