20560 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (20).
20560 is an undulating number in base 16.
20560 is strictly pandigital in base 6.
It is a nialpdrome in base 12.
It is a zygodrome in base 4.
It is a self number, because there is not a number n which added to its sum of digits gives 20560.
It is a congruent number.
In principle, a polygon with 20560 sides can be constructed with ruler and compass.
220560 is an apocalyptic number.
20560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20560 is a wasteful number, since it uses less digits than its factorization.
20560 is an evil number, because the sum of its binary digits is even.
The square root of 20560 is about 143.3875866315. The cubic root of 20560 is about 27.3951933601.
The spelling of 20560 in words is "twenty thousand, five hundred sixty".