19767819068 has 6 divisors (see below), whose sum is σ = 34593683376. Its totient is φ = 9883909532.

The previous prime is 19767819067. The next prime is 19767819091. The reversal of 19767819068 is 86091876791.

It is a self number, because there is not a number n which added to its sum of digits gives 19767819068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19767819061) by changing a digit.

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 as a sum of consecutive naturals, namely, 2470977380 + ... + 2470977387.

It is an arithmetic number, because the mean of its divisors is an integer number (5765613896).

Almost surely, 2^19767819068 is an apocalyptic number.

It is an amenable number.

19767819068 is a deficient number, since it is larger than the sum of its proper divisors (14825864308).

19767819068 is a wasteful number, since it uses less digits than its factorization.

19767819068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941954771 (or 4941954769 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 62.

The spelling of 19767819068 in words is "nineteen billion, seven hundred sixty-seven million, eight hundred nineteen thousand, sixty-eight".