18867916 has 12 divisors (see below), whose sum is σ = 33083680. Its totient is φ = 9415440.

The previous prime is 18867881. The next prime is 18867917. The reversal of 18867916 is 61976881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867917) 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, 2196 + ... + 6523.

Almost surely, 2^18867916 is an apocalyptic number.

It is an amenable number.

18867916 is a deficient number, since it is larger than the sum of its proper divisors (14215764).

18867916 is a wasteful number, since it uses less digits than its factorization.

18867916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264 (or 9262 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 18867916 is about 4343.7214459493. The cubic root of 18867916 is about 266.2203875756.

The spelling of 18867916 in words is "eighteen million, eight hundred sixty-seven thousand, nine hundred sixteen".