20564196 has 12 divisors (see below), whose sum is σ = 47983152. Its totient is φ = 6854728.

The previous prime is 20564189. The next prime is 20564207. The reversal of 20564196 is 69146502.

It is a tau number, because it is divible by the number of its divisors (12).

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, 856830 + ... + 856853.

It is an arithmetic number, because the mean of its divisors is an integer number (3998596).

Almost surely, 2^20564196 is an apocalyptic number.

It is an amenable number.

20564196 is an abundant number, since it is smaller than the sum of its proper divisors (27418956).

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

20564196 is a wasteful number, since it uses less digits than its factorization.

20564196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713690 (or 1713688 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20564196 is about 4534.7762899618. The cubic root of 20564196 is about 273.9705688814.

The spelling of 20564196 in words is "twenty million, five hundred sixty-four thousand, one hundred ninety-six".