19935902728 has 16 divisors (see below), whose sum is σ = 42719791680. Its totient is φ = 8543958288.

The previous prime is 19935902699. The next prime is 19935902743. The reversal of 19935902728 is 82720953991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177999076 + ... + 177999187.

It is an arithmetic number, because the mean of its divisors is an integer number (2669986980).

Almost surely, 2^19935902728 is an apocalyptic number.

It is an amenable number.

19935902728 is an abundant number, since it is smaller than the sum of its proper divisors (22783888952).

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

19935902728 is a wasteful number, since it uses less digits than its factorization.

19935902728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355998276 (or 355998272 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 19935902728 in words is "nineteen billion, nine hundred thirty-five million, nine hundred two thousand, seven hundred twenty-eight".