18239935328 has 12 divisors (see below), whose sum is σ = 35909872740. Its totient is φ = 9119967648.

The previous prime is 18239935309. The next prime is 18239935361. The reversal of 18239935328 is 82353993281.

It is a self number, because there is not a number n which added to its sum of digits gives 18239935328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284998958 + ... + 284999021.

It is an arithmetic number, because the mean of its divisors is an integer number (2992489395).

Almost surely, 2^18239935328 is an apocalyptic number.

It is an amenable number.

18239935328 is a deficient number, since it is larger than the sum of its proper divisors (17669937412).

18239935328 is an equidigital number, since it uses as much as digits as its factorization.

18239935328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569997989 (or 569997981 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The spelling of 18239935328 in words is "eighteen billion, two hundred thirty-nine million, nine hundred thirty-five thousand, three hundred twenty-eight".