18138696 has 32 divisors (see below), whose sum is σ = 45454560. Its totient is φ = 6031872.

The previous prime is 18138661. The next prime is 18138707. The reversal of 18138696 is 69683181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15591 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (1420455).

Almost surely, 2^18138696 is an apocalyptic number.

It is an amenable number.

18138696 is an abundant number, since it is smaller than the sum of its proper divisors (27315864).

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

18138696 is a wasteful number, since it uses less digits than its factorization.

18138696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1801 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 18138696 is about 4258.9548013568. The cubic root of 18138696 is about 262.7455407727.

The spelling of 18138696 in words is "eighteen million, one hundred thirty-eight thousand, six hundred ninety-six".