20564044 has 6 divisors (see below), whose sum is σ = 35987084. Its totient is φ = 10282020.

The previous prime is 20564041. The next prime is 20564059. The reversal of 20564044 is 44046502.

It is not an unprimeable number, because it can be changed into a prime (20564041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2570502 + ... + 2570509.

Almost surely, 2^20564044 is an apocalyptic number.

It is an amenable number.

20564044 is a deficient number, since it is larger than the sum of its proper divisors (15423040).

20564044 is a wasteful number, since it uses less digits than its factorization.

20564044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141015 (or 5141013 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20564044 is about 4534.7595305595. The cubic root of 20564044 is about 273.9698938630.

The spelling of 20564044 in words is "twenty million, five hundred sixty-four thousand, forty-four".