18974916 has 18 divisors (see below), whose sum is σ = 47964462. Its totient is φ = 6324960.

The previous prime is 18974899. The next prime is 18974929. The reversal of 18974916 is 61947981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 6230016 = 3570^2 + 2496^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263505 + ... + 263576.

Almost surely, 2^18974916 is an apocalyptic number.

It is an amenable number.

18974916 is an abundant number, since it is smaller than the sum of its proper divisors (28989546).

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

18974916 is a wasteful number, since it uses less digits than its factorization.

18974916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527091 (or 527086 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 18974916 is about 4356.0206611080. The cubic root of 18974916 is about 266.7226847594.

The spelling of 18974916 in words is "eighteen million, nine hundred seventy-four thousand, nine hundred sixteen".