19798222788 has 36 divisors (see below), whose sum is σ = 51659881728. Its totient is φ = 6386523120.

The previous prime is 19798222771. The next prime is 19798222799. The reversal of 19798222788 is 88722289791.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8869056 + ... + 8871287.

Almost surely, 2^19798222788 is an apocalyptic number.

19798222788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19798222788 is an abundant number, since it is smaller than the sum of its proper divisors (31861658940).

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

19798222788 is a wasteful number, since it uses less digits than its factorization.

19798222788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17740384 (or 17740379 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The spelling of 19798222788 in words is "nineteen billion, seven hundred ninety-eight million, two hundred twenty-two thousand, seven hundred eighty-eight".