18188402944608 has 192 divisors, whose sum is σ = 57381923128320. Its totient is φ = 5571777010176.

The previous prime is 18188402944603. The next prime is 18188402944619. The reversal of 18188402944608 is 80644920488181.

18188402944608 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 84 + 0 + 2 + 94 + 460 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18188402944603) 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 31 ways as a sum of consecutive naturals, for example, 1017160 + ... + 6116487.

It is an arithmetic number, because the mean of its divisors is an integer number (298864182960).

Almost surely, 2^{18188402944608} is an apocalyptic number.

18188402944608 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 18188402944608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28690961564160).

18188402944608 is an abundant number, since it is smaller than the sum of its proper divisors (39193520183712).

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

18188402944608 is a wasteful number, since it uses less digits than its factorization.

18188402944608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133906 (or 7133892 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 63.

The spelling of 18188402944608 in words is "eighteen trillion, one hundred eighty-eight billion, four hundred two million, nine hundred forty-four thousand, six hundred eight".