19787828797 has 8 divisors (see below), whose sum is σ = 21800453472. Its totient is φ = 17810826000.

The previous prime is 19787828789. The next prime is 19787828813. The reversal of 19787828797 is 79782878791.

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

It is not a de Polignac number, because 19787828797 - 2³ = 19787828789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19787828737) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8904303 + ... + 8906524.

It is an arithmetic number, because the mean of its divisors is an integer number (2725056684).

Almost surely, 2^19787828797 is an apocalyptic number.

It is an amenable number.

19787828797 is a deficient number, since it is larger than the sum of its proper divisors (2012624675).

19787828797 is a wasteful number, since it uses less digits than its factorization.

19787828797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17810939.

The product of its digits is 199148544, while the sum is 73.

The spelling of 19787828797 in words is "nineteen billion, seven hundred eighty-seven million, eight hundred twenty-eight thousand, seven hundred ninety-seven".