19658138413 has 2 divisors, whose sum is σ = 19658138414. Its totient is φ = 19658138412.

The previous prime is 19658138347. The next prime is 19658138429. The reversal of 19658138413 is 31483185691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19399475524 + 258662889 = 139282^2 + 16083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19658138413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19658138453) 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, 9829069206 + 9829069207.

It is an arithmetic number, because the mean of its divisors is an integer number (9829069207).

Almost surely, 2^19658138413 is an apocalyptic number.

It is an amenable number.

19658138413 is a deficient number, since it is larger than the sum of its proper divisors (1).

19658138413 is an equidigital number, since it uses as much as digits as its factorization.

19658138413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The spelling of 19658138413 in words is "nineteen billion, six hundred fifty-eight million, one hundred thirty-eight thousand, four hundred thirteen".