18118338 has 24 divisors (see below), whose sum is σ = 42153552. Its totient is φ = 5176584.

The previous prime is 18118337. The next prime is 18118349. The reversal of 18118338 is 83381181.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18118299 and 18118308.

It is not an unprimeable number, because it can be changed into a prime (18118337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30520 + ... + 31107.

It is an arithmetic number, because the mean of its divisors is an integer number (1756398).

Almost surely, 2^18118338 is an apocalyptic number.

18118338 is an abundant number, since it is smaller than the sum of its proper divisors (24035214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18118338 is a wasteful number, since it uses less digits than its factorization.

18118338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61646 (or 61639 counting only the distinct ones).

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

The square root of 18118338 is about 4256.5641073523. The cubic root of 18118338 is about 262.6472063222.

The spelling of 18118338 in words is "eighteen million, one hundred eighteen thousand, three hundred thirty-eight".