18938364 has 24 divisors (see below), whose sum is σ = 46515840. Its totient is φ = 5980464.

The previous prime is 18938299. The next prime is 18938419. The reversal of 18938364 is 46383981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41304 + ... + 41759.

It is an arithmetic number, because the mean of its divisors is an integer number (1938160).

Almost surely, 2^18938364 is an apocalyptic number.

It is an amenable number.

18938364 is an abundant number, since it is smaller than the sum of its proper divisors (27577476).

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

18938364 is a wasteful number, since it uses less digits than its factorization.

18938364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83089 (or 83087 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 18938364 is about 4351.8230662563. The cubic root of 18938364 is about 266.5513091324.

The spelling of 18938364 in words is "eighteen million, nine hundred thirty-eight thousand, three hundred sixty-four".