20580944 has 20 divisors (see below), whose sum is σ = 40244820. Its totient is φ = 10195200.

The previous prime is 20580919. The next prime is 20580947. The reversal of 20580944 is 44908502.

It can be written as a sum of positive squares in 2 ways, for example, as 12673600 + 7907344 = 3560^2 + 2812^2 .

It is a super-2 number, since 2×20580944² = 847150511862272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20580944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20580947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4157 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (2012241).

Almost surely, 2^20580944 is an apocalyptic number.

It is an amenable number.

20580944 is a deficient number, since it is larger than the sum of its proper divisors (19663876).

20580944 is a wasteful number, since it uses less digits than its factorization.

20580944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11918 (or 11912 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20580944 is about 4536.6225322370. The cubic root of 20580944 is about 274.0449248802.

The spelling of 20580944 in words is "twenty million, five hundred eighty thousand, nine hundred forty-four".