19769391964 has 12 divisors (see below), whose sum is σ = 39538783984. Its totient is φ = 8472596544.

The previous prime is 19769391949. The next prime is 19769391977. The reversal of 19769391964 is 46919396791.

19769391964 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 19769391896 and 19769391905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353024829 + ... + 353024884.

Almost surely, 2^19769391964 is an apocalyptic number.

19769391964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19769391964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19769391964 is a wasteful number, since it uses less digits than its factorization.

19769391964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706049724 (or 706049722 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 64.

The spelling of 19769391964 in words is "nineteen billion, seven hundred sixty-nine million, three hundred ninety-one thousand, nine hundred sixty-four".