18123878688 has 192 divisors, whose sum is σ = 51941191680. Its totient is φ = 5512320000.

The previous prime is 18123878681. The next prime is 18123878761. The reversal of 18123878688 is 88687832181.

It is not an unprimeable number, because it can be changed into a prime (18123878681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14191906 + ... + 14193182.

It is an arithmetic number, because the mean of its divisors is an integer number (270527040).

Almost surely, 2^18123878688 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 18123878688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25970595840).

18123878688 is an abundant number, since it is smaller than the sum of its proper divisors (33817312992).

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

18123878688 is a wasteful number, since it uses less digits than its factorization.

18123878688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1583 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 60.

The spelling of 18123878688 in words is "eighteen billion, one hundred twenty-three million, eight hundred seventy-eight thousand, six hundred eighty-eight".