20564692 has 12 divisors (see below), whose sum is σ = 36021076. Its totient is φ = 10272960.

The previous prime is 20564639. The next prime is 20564717. The reversal of 20564692 is 29646502.

It can be written as a sum of positive squares in 2 ways, for example, as 6170256 + 14394436 = 2484^2 + 3794^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 5488 + ... + 8440.

Almost surely, 2^20564692 is an apocalyptic number.

It is an amenable number.

20564692 is a deficient number, since it is larger than the sum of its proper divisors (15456384).

20564692 is a wasteful number, since it uses less digits than its factorization.

20564692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 20564692 is about 4534.8309781071. The cubic root of 20564692 is about 273.9727715497.

The spelling of 20564692 in words is "twenty million, five hundred sixty-four thousand, six hundred ninety-two".