18388113 has 8 divisors (see below), whose sum is σ = 24544128. Its totient is φ = 12245424.

The previous prime is 18388103. The next prime is 18388129. The reversal of 18388113 is 31188381.

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

It is not a de Polignac number, because 18388113 - 2¹⁸ = 18125969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18388103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 6087.

It is an arithmetic number, because the mean of its divisors is an integer number (3068016).

Almost surely, 2^18388113 is an apocalyptic number.

It is an amenable number.

18388113 is a deficient number, since it is larger than the sum of its proper divisors (6156015).

18388113 is a wasteful number, since it uses less digits than its factorization.

18388113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663.

The product of its digits is 4608, while the sum is 33.

The square root of 18388113 is about 4288.1363084678. The cubic root of 18388113 is about 263.9443609790.

The spelling of 18388113 in words is "eighteen million, three hundred eighty-eight thousand, one hundred thirteen".