20564104 has 16 divisors (see below), whose sum is σ = 42063120. Its totient is φ = 9347280.

The previous prime is 20564087. The next prime is 20564113. The reversal of 20564104 is 40146502.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 116754 + ... + 116929.

It is an arithmetic number, because the mean of its divisors is an integer number (2628945).

Almost surely, 2^20564104 is an apocalyptic number.

It is an amenable number.

20564104 is an abundant number, since it is smaller than the sum of its proper divisors (21499016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20564104 is a wasteful number, since it uses less digits than its factorization.

20564104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233700 (or 233696 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20564104 is about 4534.7661461204. The cubic root of 20564104 is about 273.9701603180.

The spelling of 20564104 in words is "twenty million, five hundred sixty-four thousand, one hundred four".