18138152 has 16 divisors (see below), whose sum is σ = 34065600. Its totient is φ = 9054000.

The previous prime is 18138149. The next prime is 18138161. The reversal of 18138152 is 25183181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4499 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (2129100).

Almost surely, 2^18138152 is an apocalyptic number.

It is an amenable number.

18138152 is a deficient number, since it is larger than the sum of its proper divisors (15927448).

18138152 is a wasteful number, since it uses less digits than its factorization.

18138152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776 (or 3772 counting only the distinct ones).

The product of its digits is 1920, while the sum is 29.

The square root of 18138152 is about 4258.8909354432. The cubic root of 18138152 is about 262.7429140678.

The spelling of 18138152 in words is "eighteen million, one hundred thirty-eight thousand, one hundred fifty-two".