19731317896149 has 16 divisors (see below), whose sum is σ = 28816529181120. Its totient is φ = 11953523214080.

The previous prime is 19731317896139. The next prime is 19731317896219. The reversal of 19731317896149 is 94169871313791.

It is a cyclic number.

It is not a de Polignac number, because 19731317896149 - 2¹⁹ = 19731317371861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19731317896139) 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 in 15 ways as a sum of consecutive naturals, for example, 6670491387 + ... + 6670494344.

It is an arithmetic number, because the mean of its divisors is an integer number (1801033073820).

Almost surely, 2^{19731317896149} is an apocalyptic number.

It is an amenable number.

19731317896149 is a deficient number, since it is larger than the sum of its proper divisors (9085211284971).

19731317896149 is a wasteful number, since it uses less digits than its factorization.

19731317896149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340985780.

The product of its digits is 61725888, while the sum is 69.

The spelling of 19731317896149 in words is "nineteen trillion, seven hundred thirty-one billion, three hundred seventeen million, eight hundred ninety-six thousand, one hundred forty-nine".