18688113 has 12 divisors (see below), whose sum is σ = 27161680. Its totient is φ = 12381336.

The previous prime is 18688091. The next prime is 18688139. The reversal of 18688113 is 31188681.

It is not a de Polignac number, because 18688113 - 2⁵ = 18688081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18688183) 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, 4903 + ... + 7836.

Almost surely, 2^18688113 is an apocalyptic number.

It is an amenable number.

18688113 is a deficient number, since it is larger than the sum of its proper divisors (8473567).

18688113 is a wasteful number, since it uses less digits than its factorization.

18688113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908 (or 12905 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 18688113 is about 4322.9750172769. The cubic root of 18688113 is about 265.3720323441.

The spelling of 18688113 in words is "eighteen million, six hundred eighty-eight thousand, one hundred thirteen".