18938805428480 has 144 divisors (see below), whose sum is σ = 52036296420864. Its totient is φ = 6469343354880.

The previous prime is 18938805428359. The next prime is 18938805428497. The reversal of 18938805428480 is 8482450883981.

It is a super-2 number, since 2×18938805428480² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18938805428480.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1471667 + ... + 6327986.

Almost surely, 2^{18938805428480} is an apocalyptic number.

18938805428480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18938805428480 is an abundant number, since it is smaller than the sum of its proper divisors (33097490992384).

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

18938805428480 is an equidigital number, since it uses as much as digits as its factorization.

18938805428480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799952 (or 7799938 counting only the distinct ones).

The product of its (nonzero) digits is 141557760, while the sum is 68.

The spelling of 18938805428480 in words is "eighteen trillion, nine hundred thirty-eight billion, eight hundred five million, four hundred twenty-eight thousand, four hundred eighty".