215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.
What is the sum of the digits of the number 21000?
This was easily solved via Python by using modulus 10 to iterate through the digits – the solution generated is 1366.
x = 2**1000 sum = 0 while (x != 0): sum += (x % 10) x //= 10 print "The solution is %d" % (sum)