18936318 has 8 divisors (see below), whose sum is σ = 37872648. Its totient is φ = 6312104.

The previous prime is 18936311. The next prime is 18936343. The reversal of 18936318 is 81363981.

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

18936318 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18936311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578021 + ... + 1578032.

It is an arithmetic number, because the mean of its divisors is an integer number (4734081).

Almost surely, 2^18936318 is an apocalyptic number.

18936318 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.

18936318 is a wasteful number, since it uses less digits than its factorization.

18936318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156058.

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

The square root of 18936318 is about 4351.5879860115. The cubic root of 18936318 is about 266.5417098587.

The spelling of 18936318 in words is "eighteen million, nine hundred thirty-six thousand, three hundred eighteen".