20560920 has 32 divisors (see below), whose sum is σ = 61683120. Its totient is φ = 5482880.

The previous prime is 20560909. The next prime is 20560921. The reversal of 20560920 is 2906502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85551 + ... + 85790.

Almost surely, 2^20560920 is an apocalyptic number.

20560920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20560920 is an abundant number, since it is smaller than the sum of its proper divisors (41122200).

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

20560920 is a wasteful number, since it uses less digits than its factorization.

20560920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171355 (or 171351 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20560920 is about 4534.4150670180. The cubic root of 20560920 is about 273.9560197228.

The spelling of 20560920 in words is "twenty million, five hundred sixty thousand, nine hundred twenty".