18836394 has 8 divisors (see below), whose sum is σ = 37672800. Its totient is φ = 6278796.

The previous prime is 18836383. The next prime is 18836401. The reversal of 18836394 is 49363881.

It is a happy number.

18836394 is nontrivially palindromic in base 12.

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

18836394 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1569694 + ... + 1569705.

It is an arithmetic number, because the mean of its divisors is an integer number (4709100).

Almost surely, 2^18836394 is an apocalyptic number.

18836394 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.

18836394 is a wasteful number, since it uses less digits than its factorization.

18836394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139404.

The product of its digits is 124416, while the sum is 42.

The square root of 18836394 is about 4340.0914736904. The cubic root of 18836394 is about 266.0720497535.

The spelling of 18836394 in words is "eighteen million, eight hundred thirty-six thousand, three hundred ninety-four".