18568240328 has 16 divisors (see below), whose sum is σ = 37980491760. Its totient is φ = 8440109200.

The previous prime is 18568240291. The next prime is 18568240367. The reversal of 18568240328 is 82304286581.

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, 105501278 + ... + 105501453.

It is an arithmetic number, because the mean of its divisors is an integer number (2373780735).

Almost surely, 2^18568240328 is an apocalyptic number.

It is an amenable number.

18568240328 is an abundant number, since it is smaller than the sum of its proper divisors (19412251432).

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

18568240328 is a wasteful number, since it uses less digits than its factorization.

18568240328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211002748 (or 211002744 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 18568240328 in words is "eighteen billion, five hundred sixty-eight million, two hundred forty thousand, three hundred twenty-eight".