18384768 has 48 divisors (see below), whose sum is σ = 52907400. Its totient is φ = 6127872.

The previous prime is 18384757. The next prime is 18384781. The reversal of 18384768 is 86748381.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6828 + ... + 9131.

Almost surely, 2^18384768 is an apocalyptic number.

18384768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18384768 is an abundant number, since it is smaller than the sum of its proper divisors (34522632).

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

18384768 is a wasteful number, since it uses less digits than its factorization.

18384768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15979 (or 15964 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18384768 is about 4287.7462611493. The cubic root of 18384768 is about 263.9283552143.

The spelling of 18384768 in words is "eighteen million, three hundred eighty-four thousand, seven hundred sixty-eight".