18313994 has 8 divisors (see below), whose sum is σ = 28357248. Its totient is φ = 8861580.

The previous prime is 18313987. The next prime is 18314029. The reversal of 18313994 is 49931381.

It is a happy number.

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

It is a Curzon number.

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, 147632 + ... + 147755.

It is an arithmetic number, because the mean of its divisors is an integer number (3544656).

Almost surely, 2^18313994 is an apocalyptic number.

18313994 is a deficient number, since it is larger than the sum of its proper divisors (10043254).

18313994 is a wasteful number, since it uses less digits than its factorization.

18313994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295420.

The product of its digits is 23328, while the sum is 38.

The square root of 18313994 is about 4279.4852494196. The cubic root of 18313994 is about 263.5892468459.

The spelling of 18313994 in words is "eighteen million, three hundred thirteen thousand, nine hundred ninety-four".