19387540344323 has 2 divisors, whose sum is σ = 19387540344324. Its totient is φ = 19387540344322.

The previous prime is 19387540344311. The next prime is 19387540344331. The reversal of 19387540344323 is 32344304578391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19387540344323 - 2²⁸ = 19387271908867 is a prime.

It is not a weakly prime, because it can be changed into another prime (19387540344383) 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, 9693770172161 + 9693770172162.

It is an arithmetic number, because the mean of its divisors is an integer number (9693770172162).

Almost surely, 2^{19387540344323} is an apocalyptic number.

19387540344323 is a deficient number, since it is larger than the sum of its proper divisors (1).

19387540344323 is an equidigital number, since it uses as much as digits as its factorization.

19387540344323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 56.

The spelling of 19387540344323 in words is "nineteen trillion, three hundred eighty-seven billion, five hundred forty million, three hundred forty-four thousand, three hundred twenty-three".