19769512842 has 24 divisors (see below), whose sum is σ = 43376149440. Its totient is φ = 6506421480.

The previous prime is 19769512817. The next prime is 19769512849. The reversal of 19769512842 is 24821596791.

It is a happy number.

19769512842 is a `hidden beast` number, since 19 + 76 + 9 + 512 + 8 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (19769512849) 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 in 11 ways as a sum of consecutive naturals, for example, 6949884 + ... + 6952727.

It is an arithmetic number, because the mean of its divisors is an integer number (1807339560).

Almost surely, 2^19769512842 is an apocalyptic number.

19769512842 is an abundant number, since it is smaller than the sum of its proper divisors (23606636598).

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

19769512842 is a wasteful number, since it uses less digits than its factorization.

19769512842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13902698 (or 13902695 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 19769512842 in words is "nineteen billion, seven hundred sixty-nine million, five hundred twelve thousand, eight hundred forty-two".