18008986 has 8 divisors (see below), whose sum is σ = 27036000. Its totient is φ = 8996988.

The previous prime is 18008917. The next prime is 18008989. The reversal of 18008986 is 68980081.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18008989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6 + ... + 6001.

It is an arithmetic number, because the mean of its divisors is an integer number (3379500).

Almost surely, 2^18008986 is an apocalyptic number.

18008986 is a deficient number, since it is larger than the sum of its proper divisors (9027014).

18008986 is a wasteful number, since it uses less digits than its factorization.

18008986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 18008986 is about 4243.6995652379. The cubic root of 18008986 is about 262.1177432438.

The spelling of 18008986 in words is "eighteen million, eight thousand, nine hundred eighty-six".