18686966 has 8 divisors (see below), whose sum is σ = 28198800. Its totient is φ = 9287368.

The previous prime is 18686959. The next prime is 18686977. The reversal of 18686966 is 66968681.

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

It is a Curzon number.

It is a congruent number.

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, 27641 + ... + 28308.

It is an arithmetic number, because the mean of its divisors is an integer number (3524850).

Almost surely, 2^18686966 is an apocalyptic number.

18686966 is a deficient number, since it is larger than the sum of its proper divisors (9511834).

18686966 is a wasteful number, since it uses less digits than its factorization.

18686966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56118.

The product of its digits is 746496, while the sum is 50.

The square root of 18686966 is about 4322.8423519717. The cubic root of 18686966 is about 265.3666030828.

The spelling of 18686966 in words is "eighteen million, six hundred eighty-six thousand, nine hundred sixty-six".