18195712128 has 256 divisors, whose sum is σ = 59952499200. Its totient is φ = 5385139200.

The previous prime is 18195712103. The next prime is 18195712141. The reversal of 18195712128 is 82121759181.

It is an unprimeable number.

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, 1629123 + ... + 1640253.

It is an arithmetic number, because the mean of its divisors is an integer number (234189450).

Almost surely, 2^18195712128 is an apocalyptic number.

18195712128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18195712128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29976249600).

18195712128 is an abundant number, since it is smaller than the sum of its proper divisors (41756787072).

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

18195712128 is a wasteful number, since it uses less digits than its factorization.

18195712128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208 (or 11190 counting only the distinct ones).

The product of its digits is 80640, while the sum is 45.

The spelling of 18195712128 in words is "eighteen billion, one hundred ninety-five million, seven hundred twelve thousand, one hundred twenty-eight".