18843345404928 has 1408 divisors, whose sum is σ = 65590360473600. Its totient is φ = 5350047252480.

The previous prime is 18843345404903. The next prime is 18843345404951. The reversal of 18843345404928 is 82940454334881.

18843345404928 is a `hidden beast` number, since 1 + 8 + 8 + 43 + 3 + 4 + 540 + 49 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 59442729826 + ... + 59442730142.

Almost surely, 2^{18843345404928} is an apocalyptic number.

18843345404928 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 18843345404928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32795180236800).

18843345404928 is an abundant number, since it is smaller than the sum of its proper divisors (46747015068672).

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

18843345404928 is a wasteful number, since it uses less digits than its factorization.

18843345404928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 106168320, while the sum is 63.

The spelling of 18843345404928 in words is "eighteen trillion, eight hundred forty-three billion, three hundred forty-five million, four hundred four thousand, nine hundred twenty-eight".