18412986 has 8 divisors (see below), whose sum is σ = 36825984. Its totient is φ = 6137660.

The previous prime is 18412981. The next prime is 18412993. The reversal of 18412986 is 68921481.

It is a sphenic number, since it is the product of 3 distinct primes.

18412986 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18412981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534410 + ... + 1534421.

It is an arithmetic number, because the mean of its divisors is an integer number (4603248).

Almost surely, 2^18412986 is an apocalyptic number.

18412986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18412986 is a wasteful number, since it uses less digits than its factorization.

18412986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068836.

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

The square root of 18412986 is about 4291.0355393541. The cubic root of 18412986 is about 264.0633169985.

The spelling of 18412986 in words is "eighteen million, four hundred twelve thousand, nine hundred eighty-six".