19928456888 has 48 divisors (see below), whose sum is σ = 40642497000. Its totient is φ = 9135218880.

The previous prime is 19928456879. The next prime is 19928456903. The reversal of 19928456888 is 88865482991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77858 + ... + 214286.

Almost surely, 2^19928456888 is an apocalyptic number.

It is an amenable number.

19928456888 is an abundant number, since it is smaller than the sum of its proper divisors (20714040112).

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

19928456888 is a wasteful number, since it uses less digits than its factorization.

19928456888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136516 (or 136481 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 68.

The spelling of 19928456888 in words is "nineteen billion, nine hundred twenty-eight million, four hundred fifty-six thousand, eight hundred eighty-eight".