18307896 has 64 divisors (see below), whose sum is σ = 48016800. Its totient is φ = 5810688.

The previous prime is 18307831. The next prime is 18307907. The reversal of 18307896 is 69870381.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46870 + ... + 47258.

Almost surely, 2^18307896 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 18307896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24008400).

18307896 is an abundant number, since it is smaller than the sum of its proper divisors (29708904).

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

18307896 is a wasteful number, since it uses less digits than its factorization.

18307896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 18307896 is about 4278.7727212368. The cubic root of 18307896 is about 263.5599878785.

The spelling of 18307896 in words is "eighteen million, three hundred seven thousand, eight hundred ninety-six".