20565112 has 8 divisors (see below), whose sum is σ = 38559600. Its totient is φ = 10282552.

The previous prime is 20565109. The next prime is 20565133. The reversal of 20565112 is 21156502.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1285312 + ... + 1285327.

It is an arithmetic number, because the mean of its divisors is an integer number (4819950).

Almost surely, 2^20565112 is an apocalyptic number.

It is an amenable number.

20565112 is a deficient number, since it is larger than the sum of its proper divisors (17994488).

20565112 is a wasteful number, since it uses less digits than its factorization.

20565112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570645 (or 2570641 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 20565112 is about 4534.8772861016. The cubic root of 20565112 is about 273.9746366847.

The spelling of 20565112 in words is "twenty million, five hundred sixty-five thousand, one hundred twelve".