The number 21982145917308330487013369 is the thirteenth power of a natural number. Find the number using just pen and paper.
(In reply to re(2): why d1 .?...spoiler
Reading all the comments & taking into account that difficulty degree should be somehow defined, I still believe that the problem is solvable eiasily,however some math. background
is a must.
D1 WAS MY CHOICE , but i would not object to d2.
D4? - compare with other posts ih this class ...