19910883328 has 48 divisors (see below), whose sum is σ = 45499512240. Its totient is φ = 8533229568.

The previous prime is 19910883319. The next prime is 19910883331. The reversal of 19910883328 is 82338801991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680101 + ... + 708772.

It is an arithmetic number, because the mean of its divisors is an integer number (947906505).

Almost surely, 2^19910883328 is an apocalyptic number.

It is an amenable number.

19910883328 is an abundant number, since it is smaller than the sum of its proper divisors (25588628912).

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

19910883328 is an equidigital number, since it uses as much as digits as its factorization.

19910883328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388902 (or 1388882 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 19910883328 in words is "nineteen billion, nine hundred ten million, eight hundred eighty-three thousand, three hundred twenty-eight".