18241686 has 20 divisors (see below), whose sum is σ = 40875252. Its totient is φ = 6080508.

The previous prime is 18241669. The next prime is 18241693. The reversal of 18241686 is 68614281.

It is a self number, because there is not a number n which added to its sum of digits gives 18241686.

It is a congruent 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 9 ways as a sum of consecutive naturals, for example, 56140 + ... + 56463.

Almost surely, 2^18241686 is an apocalyptic number.

18241686 is an abundant number, since it is smaller than the sum of its proper divisors (22633566).

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

18241686 is a wasteful number, since it uses less digits than its factorization.

18241686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112617 (or 112608 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18241686 is about 4271.0286817112. The cubic root of 18241686 is about 263.2418849618.

The spelling of 18241686 in words is "eighteen million, two hundred forty-one thousand, six hundred eighty-six".