19839670859 has 2 divisors, whose sum is σ = 19839670860. Its totient is φ = 19839670858.

The previous prime is 19839670757. The next prime is 19839670867. The reversal of 19839670859 is 95807693891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19839670859 - 2⁸ = 19839670603 is a prime.

It is a super-2 number, since 2×19839670859² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19839670795 and 19839670804.

It is not a weakly prime, because it can be changed into another prime (19839672859) 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, 9919835429 + 9919835430.

It is an arithmetic number, because the mean of its divisors is an integer number (9919835430).

Almost surely, 2^19839670859 is an apocalyptic number.

19839670859 is a deficient number, since it is larger than the sum of its proper divisors (1).

19839670859 is an equidigital number, since it uses as much as digits as its factorization.

19839670859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 19839670859 in words is "nineteen billion, eight hundred thirty-nine million, six hundred seventy thousand, eight hundred fifty-nine".