18689108 has 24 divisors (see below), whose sum is σ = 34003200. Its totient is φ = 8977248.

The previous prime is 18689093. The next prime is 18689131. The reversal of 18689108 is 80198681.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42353 + ... + 42791.

It is an arithmetic number, because the mean of its divisors is an integer number (1416800).

Almost surely, 2^18689108 is an apocalyptic number.

It is an amenable number.

18689108 is a deficient number, since it is larger than the sum of its proper divisors (15314092).

18689108 is a wasteful number, since it uses less digits than its factorization.

18689108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 18689108 is about 4323.0900985291. The cubic root of 18689108 is about 265.3767419419.

The spelling of 18689108 in words is "eighteen million, six hundred eighty-nine thousand, one hundred eight".