19443878168 has 48 divisors (see below), whose sum is σ = 43155425040. Its totient is φ = 8158265280.

The previous prime is 19443878143. The next prime is 19443878189. The reversal of 19443878168 is 86187834491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 759980 + ... + 785147.

It is an arithmetic number, because the mean of its divisors is an integer number (899071355).

Almost surely, 2^19443878168 is an apocalyptic number.

It is an amenable number.

19443878168 is an abundant number, since it is smaller than the sum of its proper divisors (23711546872).

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

19443878168 is a wasteful number, since it uses less digits than its factorization.

19443878168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545168 (or 1545153 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The spelling of 19443878168 in words is "nineteen billion, four hundred forty-three million, eight hundred seventy-eight thousand, one hundred sixty-eight".