19728380935 has 8 divisors (see below), whose sum is σ = 24437736576. Its totient is φ = 15273585120.

The previous prime is 19728380927. The next prime is 19728380957. The reversal of 19728380935 is 53908382791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19728380935 - 2³ = 19728380927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63639784 + ... + 63640093.

It is an arithmetic number, because the mean of its divisors is an integer number (3054717072).

Almost surely, 2^19728380935 is an apocalyptic number.

19728380935 is a deficient number, since it is larger than the sum of its proper divisors (4709355641).

19728380935 is a wasteful number, since it uses less digits than its factorization.

19728380935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127279913.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 19728380935 in words is "nineteen billion, seven hundred twenty-eight million, three hundred eighty thousand, nine hundred thirty-five".