20655 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is a plaindrome in base 11.
It is a nialpdrome in base 12 and base 14.
It is a zygodrome in base 4 and base 14.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20655.
It is an unprimeable number.
220655 is an apocalyptic number.
20655 is an equidigital number, since it uses as much as digits as its factorization.
20655 is an evil number, because the sum of its binary digits is even.
The square root of 20655 is about 143.7184748040. The cubic root of 20655 is about 27.4373228213.
The spelling of 20655 in words is "twenty thousand, six hundred fifty-five".