20560980 has 48 divisors (see below), whose sum is σ = 62806464. Its totient is φ = 4984320.

The previous prime is 20560933. The next prime is 20560987. The reversal of 20560980 is 8906502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14917 + ... + 16236.

It is an arithmetic number, because the mean of its divisors is an integer number (1308468).

Almost surely, 2^20560980 is an apocalyptic number.

20560980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20560980 is an abundant number, since it is smaller than the sum of its proper divisors (42245484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20560980 is a wasteful number, since it uses less digits than its factorization.

20560980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31176 (or 31174 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20560980 is about 4534.4216830815. The cubic root of 20560980 is about 273.9562862048.

The spelling of 20560980 in words is "twenty million, five hundred sixty thousand, nine hundred eighty".