18739964 has 6 divisors (see below), whose sum is σ = 32794944. Its totient is φ = 9369980.

The previous prime is 18739951. The next prime is 18739979. The reversal of 18739964 is 46993781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2342492 + ... + 2342499.

It is an arithmetic number, because the mean of its divisors is an integer number (5465824).

Almost surely, 2^18739964 is an apocalyptic number.

It is an amenable number.

18739964 is a deficient number, since it is larger than the sum of its proper divisors (14054980).

18739964 is a wasteful number, since it uses less digits than its factorization.

18739964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684995 (or 4684993 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 18739964 is about 4328.9680063498. The cubic root of 18739964 is about 265.6172345411.

The spelling of 18739964 in words is "eighteen million, seven hundred thirty-nine thousand, nine hundred sixty-four".