20079564 has 12 divisors (see below), whose sum is σ = 46852344. Its totient is φ = 6693184.

The previous prime is 20079559. The next prime is 20079611. The reversal of 20079564 is 46597002.

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, 836637 + ... + 836660.

It is an arithmetic number, because the mean of its divisors is an integer number (3904362).

Almost surely, 2^20079564 is an apocalyptic number.

It is an amenable number.

20079564 is an abundant number, since it is smaller than the sum of its proper divisors (26772780).

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

20079564 is a wasteful number, since it uses less digits than its factorization.

20079564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673304 (or 1673302 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20079564 is about 4481.0226511367. The cubic root of 20079564 is about 271.8012352662.

The spelling of 20079564 in words is "twenty million, seventy-nine thousand, five hundred sixty-four".