19969246864 has 20 divisors (see below), whose sum is σ = 44217618304. Its totient is φ = 8558248608.

The previous prime is 19969246861. The next prime is 19969246889. The reversal of 19969246864 is 46864296991.

It is a junction number, because it is equal to n+sod(n) for n = 19969246796 and 19969246805.

It is not an unprimeable number, because it can be changed into a prime (19969246861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89148312 + ... + 89148535.

Almost surely, 2^19969246864 is an apocalyptic number.

19969246864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19969246864 is an abundant number, since it is smaller than the sum of its proper divisors (24248371440).

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

19969246864 is a wasteful number, since it uses less digits than its factorization.

19969246864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178296862 (or 178296856 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 64.

The spelling of 19969246864 in words is "nineteen billion, nine hundred sixty-nine million, two hundred forty-six thousand, eight hundred sixty-four".