18124986 has 32 divisors (see below), whose sum is σ = 40393728. Its totient is φ = 5374640.

The previous prime is 18124979. The next prime is 18124999. The reversal of 18124986 is 68942181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (1262304).

Almost surely, 2^18124986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18124986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20196864).

18124986 is an abundant number, since it is smaller than the sum of its proper divisors (22268742).

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

18124986 is a wasteful number, since it uses less digits than its factorization.

18124986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5906.

The product of its digits is 27648, while the sum is 39.

The square root of 18124986 is about 4257.3449472647. The cubic root of 18124986 is about 262.6793259922.

It can be divided in two parts, 18124 and 986, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18124986 in words is "eighteen million, one hundred twenty-four thousand, nine hundred eighty-six".