18109886 has 8 divisors (see below), whose sum is σ = 27183384. Its totient is φ = 9048760.

The previous prime is 18109849. The next prime is 18109937. The reversal of 18109886 is 68890181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2861 + ... + 6663.

It is an arithmetic number, because the mean of its divisors is an integer number (3397923).

Almost surely, 2^18109886 is an apocalyptic number.

18109886 is a deficient number, since it is larger than the sum of its proper divisors (9073498).

18109886 is a wasteful number, since it uses less digits than its factorization.

18109886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186.

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

The square root of 18109886 is about 4255.5711720050. The cubic root of 18109886 is about 262.6063593184.

The spelling of 18109886 in words is "eighteen million, one hundred nine thousand, eight hundred eighty-six".