18318794 has 8 divisors (see below), whose sum is σ = 29591940. Its totient is φ = 8454816.

The previous prime is 18318791. The next prime is 18318821. The reversal of 18318794 is 49781381.

It can be written as a sum of positive squares in 2 ways, for example, as 12866569 + 5452225 = 3587^2 + 2335^2 .

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

It is a super-2 number, since 2×18318794² = 671156427228872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18318791) 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, 352259 + ... + 352310.

Almost surely, 2^18318794 is an apocalyptic number.

18318794 is a deficient number, since it is larger than the sum of its proper divisors (11273146).

18318794 is a wasteful number, since it uses less digits than its factorization.

18318794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704584.

The product of its digits is 48384, while the sum is 41.

The square root of 18318794 is about 4280.0460277899. The cubic root of 18318794 is about 263.6122732789.

The spelling of 18318794 in words is "eighteen million, three hundred eighteen thousand, seven hundred ninety-four".