19180680728 has 32 divisors (see below), whose sum is σ = 41298120000. Its totient is φ = 8259622560.

The previous prime is 19180680719. The next prime is 19180680773. The reversal of 19180680728 is 82708608191.

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 7 ways as a sum of consecutive naturals, for example, 5734178 + ... + 5737521.

It is an arithmetic number, because the mean of its divisors is an integer number (1290566250).

Almost surely, 2^19180680728 is an apocalyptic number.

It is an amenable number.

19180680728 is an abundant number, since it is smaller than the sum of its proper divisors (22117439272).

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

19180680728 is a wasteful number, since it uses less digits than its factorization.

19180680728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471735 (or 11471731 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 19180680728 in words is "nineteen billion, one hundred eighty million, six hundred eighty thousand, seven hundred twenty-eight".