18204986 has 8 divisors (see below), whose sum is σ = 27346464. Its totient is φ = 9089500.

The previous prime is 18204931. The next prime is 18205001. The reversal of 18204986 is 68940281.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4640 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (3418308).

Almost surely, 2^18204986 is an apocalyptic number.

18204986 is a deficient number, since it is larger than the sum of its proper divisors (9141478).

18204986 is a wasteful number, since it uses less digits than its factorization.

18204986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12996.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 18204986 is about 4266.7301297364. The cubic root of 18204986 is about 263.0652298119.

The spelling of 18204986 in words is "eighteen million, two hundred four thousand, nine hundred eighty-six".