19438234338311 has 2 divisors, whose sum is σ = 19438234338312. Its totient is φ = 19438234338310.

The previous prime is 19438234338307. The next prime is 19438234338319. The reversal of 19438234338311 is 11383343283491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19438234338311 - 2² = 19438234338307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19438234338319) 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, 9719117169155 + 9719117169156.

It is an arithmetic number, because the mean of its divisors is an integer number (9719117169156).

Almost surely, 2^{19438234338311} is an apocalyptic number.

19438234338311 is a deficient number, since it is larger than the sum of its proper divisors (1).

19438234338311 is an equidigital number, since it uses as much as digits as its factorization.

19438234338311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 53.

The spelling of 19438234338311 in words is "nineteen trillion, four hundred thirty-eight billion, two hundred thirty-four million, three hundred thirty-eight thousand, three hundred eleven".