18243968 has 32 divisors (see below), whose sum is σ = 37931760. Its totient is φ = 8723968.

The previous prime is 18243959. The next prime is 18243983. The reversal of 18243968 is 86934281.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 6042.

Almost surely, 2^18243968 is an apocalyptic number.

It is an amenable number.

18243968 is an abundant number, since it is smaller than the sum of its proper divisors (19687792).

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

18243968 is an equidigital number, since it uses as much as digits as its factorization.

18243968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234 (or 6222 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 18243968 is about 4271.2958221130. The cubic root of 18243968 is about 263.2528615227.

The spelling of 18243968 in words is "eighteen million, two hundred forty-three thousand, nine hundred sixty-eight".