18312038 has 8 divisors (see below), whose sum is σ = 27878232. Its totient is φ = 9019296.

The previous prime is 18312037. The next prime is 18312053. The reversal of 18312038 is 83021381.

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 = 18311998 and 18312016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312037) 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, 68195 + ... + 68462.

It is an arithmetic number, because the mean of its divisors is an integer number (3484779).

Almost surely, 2^18312038 is an apocalyptic number.

18312038 is a deficient number, since it is larger than the sum of its proper divisors (9566194).

18312038 is a wasteful number, since it uses less digits than its factorization.

18312038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136726.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18312038 is about 4279.2567111591. The cubic root of 18312038 is about 263.5798624207.

It can be divided in two parts, 183 and 12038, that added together give a palindrome (12221).

The spelling of 18312038 in words is "eighteen million, three hundred twelve thousand, thirty-eight".