20565360 has 80 divisors (see below), whose sum is σ = 70843680. Its totient is φ = 5483520.

The previous prime is 20565331. The next prime is 20565371. The reversal of 20565360 is 6356502.

20565360 is a `hidden beast` number, since 2 + 0 + 5 + 653 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 2601 + ... + 6920.

It is an arithmetic number, because the mean of its divisors is an integer number (885546).

Almost surely, 2^20565360 is an apocalyptic number.

20565360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20565360 is an abundant number, since it is smaller than the sum of its proper divisors (50278320).

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

20565360 is a wasteful number, since it uses less digits than its factorization.

20565360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543 (or 9531 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 20565360 is about 4534.9046296477. The cubic root of 20565360 is about 273.9757379906.

The spelling of 20565360 in words is "twenty million, five hundred sixty-five thousand, three hundred sixty".