19906992175439 has 2 divisors, whose sum is σ = 19906992175440. Its totient is φ = 19906992175438.

The previous prime is 19906992175417. The next prime is 19906992175451. The reversal of 19906992175439 is 93457129960991.

It is a strong prime.

It is an emirp because it is prime and its reverse (93457129960991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19906992175439 - 2²⁸ = 19906723739983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19906992175039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9953496087719 + 9953496087720.

It is an arithmetic number, because the mean of its divisors is an integer number (9953496087720).

Almost surely, 2^{19906992175439} is an apocalyptic number.

19906992175439 is a deficient number, since it is larger than the sum of its proper divisors (1).

19906992175439 is an equidigital number, since it uses as much as digits as its factorization.

19906992175439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 297606960, while the sum is 74.

The spelling of 19906992175439 in words is "nineteen trillion, nine hundred six billion, nine hundred ninety-two million, one hundred seventy-five thousand, four hundred thirty-nine".