20560636 has 12 divisors (see below), whose sum is σ = 36050728. Its totient is φ = 10260432.

The previous prime is 20560601. The next prime is 20560649. The reversal of 20560636 is 63606502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511 + ... + 6886.

Almost surely, 2^20560636 is an apocalyptic number.

It is an amenable number.

20560636 is a deficient number, since it is larger than the sum of its proper divisors (15490092).

20560636 is a wasteful number, since it uses less digits than its factorization.

20560636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948 (or 9946 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20560636 is about 4534.3837508530. The cubic root of 20560636 is about 273.9547583676.

The spelling of 20560636 in words is "twenty million, five hundred sixty thousand, six hundred thirty-six".