19166313320387 has 2 divisors, whose sum is σ = 19166313320388. Its totient is φ = 19166313320386.

The previous prime is 19166313320359. The next prime is 19166313320471. The reversal of 19166313320387 is 78302331366191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19166313320387 - 2⁸ = 19166313320131 is a prime.

It is not a weakly prime, because it can be changed into another prime (19166313340387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9583156660193 + 9583156660194.

It is an arithmetic number, because the mean of its divisors is an integer number (9583156660194).

Almost surely, 2^{19166313320387} is an apocalyptic number.

19166313320387 is a deficient number, since it is larger than the sum of its proper divisors (1).

19166313320387 is an equidigital number, since it uses as much as digits as its factorization.

19166313320387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 19166313320387 in words is "nineteen trillion, one hundred sixty-six billion, three hundred thirteen million, three hundred twenty thousand, three hundred eighty-seven".