18686005 has 32 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 12714240.

The previous prime is 18685991. The next prime is 18686011. The reversal of 18686005 is 50068681.

It is a happy number.

It is not a de Polignac number, because 18686005 - 2⁵ = 18685973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43140 + ... + 43570.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^18686005 is an apocalyptic number.

It is an amenable number.

18686005 is a deficient number, since it is larger than the sum of its proper divisors (7441355).

18686005 is a wasteful number, since it uses less digits than its factorization.

18686005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 18686005 is about 4322.7311968245. The cubic root of 18686005 is about 265.3620540711.

The spelling of 18686005 in words is "eighteen million, six hundred eighty-six thousand, five".