20564552 has 16 divisors (see below), whose sum is σ = 38625660. Its totient is φ = 10264384.

The previous prime is 20564513. The next prime is 20564561. The reversal of 20564552 is 25546502.

It can be written as a sum of positive squares in 2 ways, for example, as 20557156 + 7396 = 4534^2 + 86^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 3518 + ... + 7314.

Almost surely, 2^20564552 is an apocalyptic number.

It is an amenable number.

20564552 is a deficient number, since it is larger than the sum of its proper divisors (18061108).

20564552 is a wasteful number, since it uses less digits than its factorization.

20564552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480 (or 4476 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20564552 is about 4534.8155420039. The cubic root of 20564552 is about 273.9721498324.

The spelling of 20564552 in words is "twenty million, five hundred sixty-four thousand, five hundred fifty-two".