18994318 has 8 divisors (see below), whose sum is σ = 32561712. Its totient is φ = 8140416.

The previous prime is 18994309. The next prime is 18994337. The reversal of 18994318 is 81349981.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678355 + ... + 678382.

It is an arithmetic number, because the mean of its divisors is an integer number (4070214).

Almost surely, 2^18994318 is an apocalyptic number.

18994318 is a deficient number, since it is larger than the sum of its proper divisors (13567394).

18994318 is a wasteful number, since it uses less digits than its factorization.

18994318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356746.

The product of its digits is 62208, while the sum is 43.

The square root of 18994318 is about 4358.2471247051. The cubic root of 18994318 is about 266.8135624690.

The spelling of 18994318 in words is "eighteen million, nine hundred ninety-four thousand, three hundred eighteen".