19739315459 has 2 divisors, whose sum is σ = 19739315460. Its totient is φ = 19739315458.

The previous prime is 19739315443. The next prime is 19739315473. The reversal of 19739315459 is 95451393791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19739315459 - 2⁴ = 19739315443 is a prime.

It is not a weakly prime, because it can be changed into another prime (19739315359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9869657729 + 9869657730.

It is an arithmetic number, because the mean of its divisors is an integer number (9869657730).

Almost surely, 2^19739315459 is an apocalyptic number.

19739315459 is a deficient number, since it is larger than the sum of its proper divisors (1).

19739315459 is an equidigital number, since it uses as much as digits as its factorization.

19739315459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4592700, while the sum is 56.

The spelling of 19739315459 in words is "nineteen billion, seven hundred thirty-nine million, three hundred fifteen thousand, four hundred fifty-nine".