18673608786191 has 2 divisors, whose sum is σ = 18673608786192. Its totient is φ = 18673608786190.

The previous prime is 18673608786097. The next prime is 18673608786223. The reversal of 18673608786191 is 19168780637681.

It is a strong prime.

It is an emirp because it is prime and its reverse (19168780637681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18673608786191 - 2³⁸ = 18398730879247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18673608726191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336804393095 + 9336804393096.

It is an arithmetic number, because the mean of its divisors is an integer number (9336804393096).

Almost surely, 2^{18673608786191} is an apocalyptic number.

18673608786191 is a deficient number, since it is larger than the sum of its proper divisors (1).

18673608786191 is an equidigital number, since it uses as much as digits as its factorization.

18673608786191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146313216, while the sum is 71.

The spelling of 18673608786191 in words is "eighteen trillion, six hundred seventy-three billion, six hundred eight million, seven hundred eighty-six thousand, one hundred ninety-one".