19478808888 has 192 divisors, whose sum is σ = 62965537920. Its totient is φ = 4963795200.

The previous prime is 19478808887. The next prime is 19478808893. The reversal of 19478808888 is 88880887491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19478808887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671403 + ... + 699813.

It is an arithmetic number, because the mean of its divisors is an integer number (327945510).

Almost surely, 2^19478808888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19478808888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31482768960).

19478808888 is an abundant number, since it is smaller than the sum of its proper divisors (43486729032).

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

19478808888 is a wasteful number, since it uses less digits than its factorization.

19478808888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28498 (or 28487 counting only the distinct ones).

The product of its (nonzero) digits is 66060288, while the sum is 69.

The spelling of 19478808888 in words is "nineteen billion, four hundred seventy-eight million, eight hundred eight thousand, eight hundred eighty-eight".