19764809423231 has 2 divisors, whose sum is σ = 19764809423232. Its totient is φ = 19764809423230.

The previous prime is 19764809423201. The next prime is 19764809423237. The reversal of 19764809423231 is 13232490846791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19764809423231 - 2³⁰ = 19763735681407 is a prime.

It is a super-2 number, since 2×19764809423231² (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 (19764809423237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9882404711615 + 9882404711616.

It is an arithmetic number, because the mean of its divisors is an integer number (9882404711616).

Almost surely, 2^{19764809423231} is an apocalyptic number.

19764809423231 is a deficient number, since it is larger than the sum of its proper divisors (1).

19764809423231 is an equidigital number, since it uses as much as digits as its factorization.

19764809423231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 19764809423231 in words is "nineteen trillion, seven hundred sixty-four billion, eight hundred nine million, four hundred twenty-three thousand, two hundred thirty-one".