18618358 has 16 divisors (see below), whose sum is σ = 30886416. Its totient is φ = 8346240.

The previous prime is 18618343. The next prime is 18618367. The reversal of 18618358 is 85381681.

It is a self number, because there is not a number n which added to its sum of digits gives 18618358.

It is a congruent number.

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, 4191 + ... + 7402.

It is an arithmetic number, because the mean of its divisors is an integer number (1930401).

Almost surely, 2^18618358 is an apocalyptic number.

18618358 is a deficient number, since it is larger than the sum of its proper divisors (12268058).

18618358 is a wasteful number, since it uses less digits than its factorization.

18618358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11679.

The product of its digits is 46080, while the sum is 40.

The square root of 18618358 is about 4314.8995353310. The cubic root of 18618358 is about 265.0414459917.

The spelling of 18618358 in words is "eighteen million, six hundred eighteen thousand, three hundred fifty-eight".