18339768 has 48 divisors (see below), whose sum is σ = 50172720. Its totient is φ = 6051456.

The previous prime is 18339707. The next prime is 18339791. The reversal of 18339768 is 86793381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6180 + ... + 8652.

It is an arithmetic number, because the mean of its divisors is an integer number (1045265).

Almost surely, 2^18339768 is an apocalyptic number.

18339768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18339768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25086360).

18339768 is an abundant number, since it is smaller than the sum of its proper divisors (31832952).

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

18339768 is a wasteful number, since it uses less digits than its factorization.

18339768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588 (or 2581 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 18339768 is about 4282.4955341483. The cubic root of 18339768 is about 263.7128420359.

The spelling of 18339768 in words is "eighteen million, three hundred thirty-nine thousand, seven hundred sixty-eight".