19928686573 has 2 divisors, whose sum is σ = 19928686574. Its totient is φ = 19928686572.

The previous prime is 19928686553. The next prime is 19928686637. The reversal of 19928686573 is 37568682991.

It is an a-pointer prime, because the next prime (19928686637) can be obtained adding 19928686573 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19836468964 + 92217609 = 140842^2 + 9603^2 .

It is a cyclic number.

It is not a de Polignac number, because 19928686573 - 2²⁹ = 19391815661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19928686553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9964343286 + 9964343287.

It is an arithmetic number, because the mean of its divisors is an integer number (9964343287).

Almost surely, 2^19928686573 is an apocalyptic number.

It is an amenable number.

19928686573 is a deficient number, since it is larger than the sum of its proper divisors (1).

19928686573 is an equidigital number, since it uses as much as digits as its factorization.

19928686573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 64.

The spelling of 19928686573 in words is "nineteen billion, nine hundred twenty-eight million, six hundred eighty-six thousand, five hundred seventy-three".