18980564 has 12 divisors (see below), whose sum is σ = 33712224. Its totient is φ = 9348504.

The previous prime is 18980561. The next prime is 18980573. The reversal of 18980564 is 46508981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35144 + ... + 35679.

It is an arithmetic number, because the mean of its divisors is an integer number (2809352).

Almost surely, 2^18980564 is an apocalyptic number.

It is an amenable number.

18980564 is a deficient number, since it is larger than the sum of its proper divisors (14731660).

18980564 is a wasteful number, since it uses less digits than its factorization.

18980564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70894 (or 70892 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 18980564 is about 4356.6689109915. The cubic root of 18980564 is about 266.7491460145.

The spelling of 18980564 in words is "eighteen million, nine hundred eighty thousand, five hundred sixty-four".