18238369128 has 256 divisors, whose sum is σ = 55153459200. Its totient is φ = 4916920320.

The previous prime is 18238369109. The next prime is 18238369153. The reversal of 18238369128 is 82196383281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39908676 + ... + 39909132.

It is an arithmetic number, because the mean of its divisors is an integer number (215443200).

Almost surely, 2^18238369128 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 18238369128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27576729600).

18238369128 is an abundant number, since it is smaller than the sum of its proper divisors (36915090072).

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

18238369128 is a wasteful number, since it uses less digits than its factorization.

18238369128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 676 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The spelling of 18238369128 in words is "eighteen billion, two hundred thirty-eight million, three hundred sixty-nine thousand, one hundred twenty-eight".