18149394 has 8 divisors (see below), whose sum is σ = 36298800. Its totient is φ = 6049796.

The previous prime is 18149377. The next prime is 18149401. The reversal of 18149394 is 49394181.

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

18149394 is an admirable number.

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, 1512444 + ... + 1512455.

It is an arithmetic number, because the mean of its divisors is an integer number (4537350).

Almost surely, 2^18149394 is an apocalyptic number.

18149394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18149394 is a wasteful number, since it uses less digits than its factorization.

18149394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024904.

The product of its digits is 31104, while the sum is 39.

The square root of 18149394 is about 4260.2105581767. The cubic root of 18149394 is about 262.7971854145.

The spelling of 18149394 in words is "eighteen million, one hundred forty-nine thousand, three hundred ninety-four".