19728584616 has 64 divisors (see below), whose sum is σ = 53128797120. Its totient is φ = 6068805120.

The previous prime is 19728584597. The next prime is 19728584723. The reversal of 19728584616 is 61648582791.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2354851 + ... + 2363213.

It is an arithmetic number, because the mean of its divisors is an integer number (830137455).

Almost surely, 2^19728584616 is an apocalyptic number.

It is an amenable number.

19728584616 is an abundant number, since it is smaller than the sum of its proper divisors (33400212504).

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

19728584616 is a wasteful number, since it uses less digits than its factorization.

19728584616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15946 (or 15942 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The spelling of 19728584616 in words is "nineteen billion, seven hundred twenty-eight million, five hundred eighty-four thousand, six hundred sixteen".