19678836828 has 48 divisors (see below), whose sum is σ = 54169708544. Its totient is φ = 5441152320.

The previous prime is 19678836799. The next prime is 19678836833. The reversal of 19678836828 is 82863887691.

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 15 ways as a sum of consecutive naturals, for example, 3775975 + ... + 3781182.

Almost surely, 2^19678836828 is an apocalyptic number.

It is an amenable number.

19678836828 is an abundant number, since it is smaller than the sum of its proper divisors (34490871716).

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

19678836828 is a wasteful number, since it uses less digits than its factorization.

19678836828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557202 (or 7557200 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 66.

The spelling of 19678836828 in words is "nineteen billion, six hundred seventy-eight million, eight hundred thirty-six thousand, eight hundred twenty-eight".