18173394 has 24 divisors (see below), whose sum is σ = 39526812. Its totient is φ = 6034560.

The previous prime is 18173387. The next prime is 18173413. The reversal of 18173394 is 49337181.

It is a happy number.

18173394 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 225 = 4263^2 + 15^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3262 + ... + 6854.

Almost surely, 2^18173394 is an apocalyptic number.

18173394 is an abundant number, since it is smaller than the sum of its proper divisors (21353418).

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

18173394 is a wasteful number, since it uses less digits than its factorization.

18173394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882 (or 3879 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 18173394 is about 4263.0263897846. The cubic root of 18173394 is about 262.9129717303.

The spelling of 18173394 in words is "eighteen million, one hundred seventy-three thousand, three hundred ninety-four".