18486986 has 16 divisors (see below), whose sum is σ = 33070464. Its totient is φ = 7578384.

The previous prime is 18486977. The next prime is 18486997. The reversal of 18486986 is 68968481.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28385 + ... + 29028.

It is an arithmetic number, because the mean of its divisors is an integer number (2066904).

Almost surely, 2^18486986 is an apocalyptic number.

18486986 is a deficient number, since it is larger than the sum of its proper divisors (14583478).

18486986 is a wasteful number, since it uses less digits than its factorization.

18486986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57445.

The product of its digits is 663552, while the sum is 50.

The square root of 18486986 is about 4299.6495206005. The cubic root of 18486986 is about 264.4165924237.

The spelling of 18486986 in words is "eighteen million, four hundred eighty-six thousand, nine hundred eighty-six".