19690969513 has 2 divisors, whose sum is σ = 19690969514. Its totient is φ = 19690969512.

The previous prime is 19690969481. The next prime is 19690969537. The reversal of 19690969513 is 31596909691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15244347024 + 4446622489 = 123468^2 + 66683^2 .

It is a cyclic number.

It is not a de Polignac number, because 19690969513 - 2⁵ = 19690969481 is a prime.

It is not a weakly prime, because it can be changed into another prime (19690969913) 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, 9845484756 + 9845484757.

It is an arithmetic number, because the mean of its divisors is an integer number (9845484757).

Almost surely, 2^19690969513 is an apocalyptic number.

It is an amenable number.

19690969513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19690969513 is an equidigital number, since it uses as much as digits as its factorization.

19690969513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3542940, while the sum is 58.

The spelling of 19690969513 in words is "nineteen billion, six hundred ninety million, nine hundred sixty-nine thousand, five hundred thirteen".