19899984288 has 24 divisors (see below), whose sum is σ = 52237459008. Its totient is φ = 6633328064.

The previous prime is 19899984277. The next prime is 19899984289. The reversal of 19899984288 is 88248999891.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (19899984289) 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, 103645656 + ... + 103645847.

It is an arithmetic number, because the mean of its divisors is an integer number (2176560792).

Almost surely, 2^19899984288 is an apocalyptic number.

It is an amenable number.

19899984288 is an abundant number, since it is smaller than the sum of its proper divisors (32337474720).

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

19899984288 is a wasteful number, since it uses less digits than its factorization.

19899984288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207291516 (or 207291508 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 75.

The spelling of 19899984288 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred eighty-four thousand, two hundred eighty-eight".