19689458839 has 2 divisors, whose sum is σ = 19689458840. Its totient is φ = 19689458838.

The previous prime is 19689458807. The next prime is 19689458849. The reversal of 19689458839 is 93885498691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19689458839 - 2⁵ = 19689458807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19689458849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844729419 + 9844729420.

It is an arithmetic number, because the mean of its divisors is an integer number (9844729420).

Almost surely, 2^19689458839 is an apocalyptic number.

19689458839 is a deficient number, since it is larger than the sum of its proper divisors (1).

19689458839 is an equidigital number, since it uses as much as digits as its factorization.

19689458839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134369280, while the sum is 70.

The spelling of 19689458839 in words is "nineteen billion, six hundred eighty-nine million, four hundred fifty-eight thousand, eight hundred thirty-nine".