18016686 has 24 divisors (see below), whose sum is σ = 39115440. Its totient is φ = 5993376.

The previous prime is 18016681. The next prime is 18016717. The reversal of 18016686 is 68661081.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18016686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18016681) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 14506 + ... + 15698.

It is an arithmetic number, because the mean of its divisors is an integer number (1629810).

Almost surely, 2^18016686 is an apocalyptic number.

18016686 is an abundant number, since it is smaller than the sum of its proper divisors (21098754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18016686 is a wasteful number, since it uses less digits than its factorization.

18016686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18016686 is about 4244.6066955609. The cubic root of 18016686 is about 262.1550953197.

The spelling of 18016686 in words is "eighteen million, sixteen thousand, six hundred eighty-six".