18998074 has 8 divisors (see below), whose sum is σ = 29479860. Its totient is φ = 9171456.

The previous prime is 18998053. The next prime is 18998093. The reversal of 18998074 is 47089981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16769025 + 2229049 = 4095^2 + 1493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163719 + ... + 163834.

Almost surely, 2^18998074 is an apocalyptic number.

18998074 is a deficient number, since it is larger than the sum of its proper divisors (10481786).

18998074 is a wasteful number, since it uses less digits than its factorization.

18998074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327584.

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

The square root of 18998074 is about 4358.6780105899. The cubic root of 18998074 is about 266.8311481788.

The spelling of 18998074 in words is "eighteen million, nine hundred ninety-eight thousand, seventy-four".