19349887944 has 32 divisors (see below), whose sum is σ = 48398706720. Its totient is φ = 6446764416.

The previous prime is 19349887933. The next prime is 19349888009. The reversal of 19349887944 is 44978894391.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150229 + ... + 247524.

It is an arithmetic number, because the mean of its divisors is an integer number (1512459585).

Almost surely, 2^19349887944 is an apocalyptic number.

It is an amenable number.

19349887944 is an abundant number, since it is smaller than the sum of its proper divisors (29048818776).

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

19349887944 is a wasteful number, since it uses less digits than its factorization.

19349887944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399789 (or 399785 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 66.

The spelling of 19349887944 in words is "nineteen billion, three hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred forty-four".