19926368856 has 48 divisors (see below), whose sum is σ = 53986734360. Its totient is φ = 6639724800.

The previous prime is 19926368783. The next prime is 19926368857. The reversal of 19926368856 is 65886362991.

19926368856 is a `hidden beast` number, since 199 + 2 + 6 + 368 + 85 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19926368793 and 19926368802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19926368857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156736 + ... + 253808.

Almost surely, 2^19926368856 is an apocalyptic number.

It is an amenable number.

19926368856 is an abundant number, since it is smaller than the sum of its proper divisors (34060365504).

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

19926368856 is a wasteful number, since it uses less digits than its factorization.

19926368856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99936 (or 99929 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The spelling of 19926368856 in words is "nineteen billion, nine hundred twenty-six million, three hundred sixty-eight thousand, eight hundred fifty-six".