19926368864 has 24 divisors (see below), whose sum is σ = 41294778840. Its totient is φ = 9438806016.

The previous prime is 19926368863. The next prime is 19926368909. The reversal of 19926368864 is 46886362991.

It is a super-2 number, since 2×19926368864² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19926368797 and 19926368806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19926368863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16386209 + ... + 16387424.

It is an arithmetic number, because the mean of its divisors is an integer number (1720615785).

Almost surely, 2^19926368864 is an apocalyptic number.

It is an amenable number.

19926368864 is an abundant number, since it is smaller than the sum of its proper divisors (21368409976).

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

19926368864 is a wasteful number, since it uses less digits than its factorization.

19926368864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32773662 (or 32773654 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 62.

The spelling of 19926368864 in words is "nineteen billion, nine hundred twenty-six million, three hundred sixty-eight thousand, eight hundred sixty-four".