20564344 has 16 divisors (see below), whose sum is σ = 38613600. Its totient is φ = 10267392.

The previous prime is 20564321. The next prime is 20564359. The reversal of 20564344 is 44346502.

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 3 ways as a sum of consecutive naturals, for example, 6049 + ... + 8815.

It is an arithmetic number, because the mean of its divisors is an integer number (2413350).

Almost surely, 2^20564344 is an apocalyptic number.

It is an amenable number.

20564344 is a deficient number, since it is larger than the sum of its proper divisors (18049256).

20564344 is a wasteful number, since it uses less digits than its factorization.

20564344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3698 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 20564344 is about 4534.7926082678. The cubic root of 20564344 is about 273.9712261329.

It can be divided in two parts, 2056 and 4344, that added together give a square (6400 = 80²).

The spelling of 20564344 in words is "twenty million, five hundred sixty-four thousand, three hundred forty-four".