20564452 has 24 divisors (see below), whose sum is σ = 37873080. Its totient is φ = 9757440.

The previous prime is 20564431. The next prime is 20564459. The reversal of 20564452 is 25446502.

It can be written as a sum of positive squares in 4 ways, for example, as 7431076 + 13133376 = 2726^2 + 3624^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20564452.

It is not an unprimeable number, because it can be changed into a prime (20564459) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4374 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (1578045).

Almost surely, 2^20564452 is an apocalyptic number.

It is an amenable number.

20564452 is a deficient number, since it is larger than the sum of its proper divisors (17308628).

20564452 is a wasteful number, since it uses less digits than its factorization.

20564452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471 (or 3469 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 20564452 is about 4534.8045161837. The cubic root of 20564452 is about 273.9717057469.

The spelling of 20564452 in words is "twenty million, five hundred sixty-four thousand, four hundred fifty-two".