18120886 has 24 divisors (see below), whose sum is σ = 31826520. Its totient is φ = 7715232.

The previous prime is 18120871. The next prime is 18120899. The reversal of 18120886 is 68802181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17026 + ... + 18058.

It is an arithmetic number, because the mean of its divisors is an integer number (1326105).

Almost surely, 2^18120886 is an apocalyptic number.

18120886 is a deficient number, since it is larger than the sum of its proper divisors (13705634).

18120886 is a wasteful number, since it uses less digits than its factorization.

18120886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 18120886 is about 4256.8633992648. The cubic root of 18120886 is about 262.6595178582.

The spelling of 18120886 in words is "eighteen million, one hundred twenty thousand, eight hundred eighty-six".