18239115116 has 24 divisors (see below), whose sum is σ = 33471419520. Its totient is φ = 8684468352.

The previous prime is 18239115049. The next prime is 18239115119. The reversal of 18239115116 is 61151193281.

It is a self number, because there is not a number n which added to its sum of digits gives 18239115116.

It is not an unprimeable number, because it can be changed into a prime (18239115119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1068476 + ... + 1085411.

It is an arithmetic number, because the mean of its divisors is an integer number (1394642480).

Almost surely, 2^18239115116 is an apocalyptic number.

It is an amenable number.

18239115116 is a deficient number, since it is larger than the sum of its proper divisors (15232304404).

18239115116 is a wasteful number, since it uses less digits than its factorization.

18239115116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153993 (or 2153991 counting only the distinct ones).

The product of its digits is 12960, while the sum is 38.

The spelling of 18239115116 in words is "eighteen billion, two hundred thirty-nine million, one hundred fifteen thousand, one hundred sixteen".