18618394 has 16 divisors (see below), whose sum is σ = 28758240. Its totient is φ = 9036400.

The previous prime is 18618389. The next prime is 18618409. The reversal of 18618394 is 49381681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8844 + ... + 10744.

It is an arithmetic number, because the mean of its divisors is an integer number (1797390).

Almost surely, 2^18618394 is an apocalyptic number.

18618394 is a deficient number, since it is larger than the sum of its proper divisors (10139846).

18618394 is a wasteful number, since it uses less digits than its factorization.

18618394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its digits is 41472, while the sum is 40.

The square root of 18618394 is about 4314.9037069209. The cubic root of 18618394 is about 265.0416168175.

The spelling of 18618394 in words is "eighteen million, six hundred eighteen thousand, three hundred ninety-four".