19879448996784 has 320 divisors, whose sum is σ = 59643382579200. Its totient is φ = 5651174670336.

The previous prime is 19879448996777. The next prime is 19879448996831. The reversal of 19879448996784 is 48769984497891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144910977 + ... + 145048095.

It is an arithmetic number, because the mean of its divisors is an integer number (186385570560).

Almost surely, 2^{19879448996784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19879448996784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29821691289600).

19879448996784 is an abundant number, since it is smaller than the sum of its proper divisors (39763933582416).

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

19879448996784 is a wasteful number, since it uses less digits than its factorization.

19879448996784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137412 (or 137406 counting only the distinct ones).

The product of its digits is 63207309312, while the sum is 93.

The spelling of 19879448996784 in words is "nineteen trillion, eight hundred seventy-nine billion, four hundred forty-eight million, nine hundred ninety-six thousand, seven hundred eighty-four".