18318038 has 8 divisors (see below), whose sum is σ = 27511488. Its totient is φ = 9147544.

The previous prime is 18318037. The next prime is 18318049. The reversal of 18318038 is 83081381.

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

It is a junction number, because it is equal to n+sod(n) for n = 18317995 and 18318013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318037) 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, 3581 + ... + 7032.

It is an arithmetic number, because the mean of its divisors is an integer number (3438936).

Almost surely, 2^18318038 is an apocalyptic number.

18318038 is a deficient number, since it is larger than the sum of its proper divisors (9193450).

18318038 is a wasteful number, since it uses less digits than its factorization.

18318038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18318038 is about 4279.9577100714. The cubic root of 18318038 is about 263.6086468826.

The spelling of 18318038 in words is "eighteen million, three hundred eighteen thousand, thirty-eight".