19825486789 has 2 divisors, whose sum is σ = 19825486790. Its totient is φ = 19825486788.

The previous prime is 19825486763. The next prime is 19825486861. The reversal of 19825486789 is 98768452891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18254712100 + 1570774689 = 135110^2 + 39633^2 .

It is a cyclic number.

It is not a de Polignac number, because 19825486789 - 2¹⁷ = 19825355717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19825481789) 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 as a sum of consecutive naturals, namely, 9912743394 + 9912743395.

It is an arithmetic number, because the mean of its divisors is an integer number (9912743395).

Almost surely, 2^19825486789 is an apocalyptic number.

It is an amenable number.

19825486789 is a deficient number, since it is larger than the sum of its proper divisors (1).

19825486789 is an equidigital number, since it uses as much as digits as its factorization.

19825486789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69672960, while the sum is 67.

The spelling of 19825486789 in words is "nineteen billion, eight hundred twenty-five million, four hundred eighty-six thousand, seven hundred eighty-nine".