19789578782 has 16 divisors (see below), whose sum is σ = 31282143360. Its totient is φ = 9363379032.

The previous prime is 19789578769. The next prime is 19789578793. The reversal of 19789578782 is 28787598791.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261338 + ... + 328445.

It is an arithmetic number, because the mean of its divisors is an integer number (1955133960).

Almost surely, 2^19789578782 is an apocalyptic number.

19789578782 is a deficient number, since it is larger than the sum of its proper divisors (11492564578).

19789578782 is a wasteful number, since it uses less digits than its factorization.

19789578782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590687.

The product of its digits is 142248960, while the sum is 71.

The spelling of 19789578782 in words is "nineteen billion, seven hundred eighty-nine million, five hundred seventy-eight thousand, seven hundred eighty-two".