18844787387712 has 448 divisors, whose sum is σ = 59441781934080. Its totient is φ = 5193547161600.

The previous prime is 18844787387623. The next prime is 18844787387731. The reversal of 18844787387712 is 21778378744881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4559588398 + ... + 4559592530.

It is an arithmetic number, because the mean of its divisors is an integer number (132682548960).

Almost surely, 2^{18844787387712} is an apocalyptic number.

18844787387712 is a gapful number since it is divisible by the number (12) 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 18844787387712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29720890967040).

18844787387712 is an abundant number, since it is smaller than the sum of its proper divisors (40596994546368).

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

18844787387712 is a wasteful number, since it uses less digits than its factorization.

18844787387712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582 (or 6572 counting only the distinct ones).

The product of its digits is 944111616, while the sum is 75.

The spelling of 18844787387712 in words is "eighteen trillion, eight hundred forty-four billion, seven hundred eighty-seven million, three hundred eighty-seven thousand, seven hundred twelve".