19512625798213 has 2 divisors, whose sum is σ = 19512625798214. Its totient is φ = 19512625798212.

The previous prime is 19512625798199. The next prime is 19512625798243. The reversal of 19512625798213 is 31289752621591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10856543935329 + 8656081862884 = 3294927^2 + 2942122^2 .

It is a cyclic number.

It is not a de Polignac number, because 19512625798213 - 2²¹ = 19512623701061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19512625798243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9756312899106 + 9756312899107.

It is an arithmetic number, because the mean of its divisors is an integer number (9756312899107).

Almost surely, 2^{19512625798213} is an apocalyptic number.

It is an amenable number.

19512625798213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19512625798213 is an equidigital number, since it uses as much as digits as its factorization.

19512625798213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 61.

The spelling of 19512625798213 in words is "nineteen trillion, five hundred twelve billion, six hundred twenty-five million, seven hundred ninety-eight thousand, two hundred thirteen".