19789750822779 has 24 divisors (see below), whose sum is σ = 34104786000720. Its totient is φ = 11308429040832.

The previous prime is 19789750822747. The next prime is 19789750822781. The reversal of 19789750822779 is 97722805798791.

19789750822779 is a `hidden beast` number, since 1 + 9 + 7 + 89 + 7 + 508 + 2 + 27 + 7 + 9 = 666.

It is not a de Polignac number, because 19789750822779 - 2⁵ = 19789750822747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19789750822698 and 19789750822707.

It is not an unprimeable number, because it can be changed into a prime (19789750822729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7479118414 + ... + 7479121059.

It is an arithmetic number, because the mean of its divisors is an integer number (1421032750030).

Almost surely, 2^{19789750822779} is an apocalyptic number.

19789750822779 is a deficient number, since it is larger than the sum of its proper divisors (14315035177941).

19789750822779 is a wasteful number, since it uses less digits than its factorization.

19789750822779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14958239496 (or 14958239483 counting only the distinct ones).

The product of its (nonzero) digits is 2240421120, while the sum is 81.

The spelling of 19789750822779 in words is "nineteen trillion, seven hundred eighty-nine billion, seven hundred fifty million, eight hundred twenty-two thousand, seven hundred seventy-nine".