18416986 has 16 divisors (see below), whose sum is σ = 32307264. Its totient is φ = 7709184.

The previous prime is 18416977. The next prime is 18416989. The reversal of 18416986 is 68961481.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (18416989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14695 + ... + 15898.

It is an arithmetic number, because the mean of its divisors is an integer number (2019204).

Almost surely, 2^18416986 is an apocalyptic number.

18416986 is a deficient number, since it is larger than the sum of its proper divisors (13890278).

18416986 is a wasteful number, since it uses less digits than its factorization.

18416986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645.

The product of its digits is 82944, while the sum is 43.

The square root of 18416986 is about 4291.5016020037. The cubic root of 18416986 is about 264.0824371418.

The spelling of 18416986 in words is "eighteen million, four hundred sixteen thousand, nine hundred eighty-six".