Adding to 20356 its reverse (65302), we get a palindrome (85658).
20356 is an admirable number.
It is a d-powerful number, because it can be written as 29 + 0 + 39 + 53 + 62 .
It is a nialpdrome in base 12.
220356 is an apocalyptic number.
It is an amenable number.
20356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20356 is a wasteful number, since it uses less digits than its factorization.
20356 is an odious number, because the sum of its binary digits is odd.
The square root of 20356 is about 142.6744546161. The cubic root of 20356 is about 27.3042853546.
The spelling of 20356 in words is "twenty thousand, three hundred fifty-six".