18371668 has 36 divisors (see below), whose sum is σ = 37984800. Its totient is φ = 7750512.

The previous prime is 18371663. The next prime is 18371677. The reversal of 18371668 is 86617381.

It is a self number, because there is not a number n which added to its sum of digits gives 18371668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18371663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12433 + ... + 13831.

Almost surely, 2^18371668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18371668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18992400).

18371668 is an abundant number, since it is smaller than the sum of its proper divisors (19613132).

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

18371668 is a wasteful number, since it uses less digits than its factorization.

18371668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1475 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 18371668 is about 4286.2183798775. The cubic root of 18371668 is about 263.8656532540.

The spelling of 18371668 in words is "eighteen million, three hundred seventy-one thousand, six hundred sixty-eight".