19393526341949 has 2 divisors, whose sum is σ = 19393526341950. Its totient is φ = 19393526341948.

The previous prime is 19393526341919. The next prime is 19393526342093. The reversal of 19393526341949 is 94914362539391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16665116137849 + 2728410204100 = 4082293^2 + 1651790^2 .

It is an emirp because it is prime and its reverse (94914362539391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19393526341949 - 2¹² = 19393526337853 is a prime.

It is a super-2 number, since 2×19393526341949² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19393526341919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9696763170974 + 9696763170975.

It is an arithmetic number, because the mean of its divisors is an integer number (9696763170975).

Almost surely, 2^{19393526341949} is an apocalyptic number.

It is an amenable number.

19393526341949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19393526341949 is an equidigital number, since it uses as much as digits as its factorization.

19393526341949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170061120, while the sum is 68.

The spelling of 19393526341949 in words is "nineteen trillion, three hundred ninety-three billion, five hundred twenty-six million, three hundred forty-one thousand, nine hundred forty-nine".