18338680 has 32 divisors (see below), whose sum is σ = 42380640. Its totient is φ = 7136640.

The previous prime is 18338653. The next prime is 18338681. The reversal of 18338680 is 8683381.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4716 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (1324395).

Almost surely, 2^18338680 is an apocalyptic number.

18338680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18338680 is an abundant number, since it is smaller than the sum of its proper divisors (24041960).

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

18338680 is a wasteful number, since it uses less digits than its factorization.

18338680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439 (or 12435 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18338680 is about 4282.3685035270. The cubic root of 18338680 is about 263.7076270436.

The spelling of 18338680 in words is "eighteen million, three hundred thirty-eight thousand, six hundred eighty".