18274830108991 has 2 divisors, whose sum is σ = 18274830108992. Its totient is φ = 18274830108990.

The previous prime is 18274830108979. The next prime is 18274830109147. The reversal of 18274830108991 is 19980103847281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18274830108991 - 2²³ = 18274821720383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18274830108901) 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 as a sum of consecutive naturals, namely, 9137415054495 + 9137415054496.

It is an arithmetic number, because the mean of its divisors is an integer number (9137415054496).

Almost surely, 2^{18274830108991} is an apocalyptic number.

18274830108991 is a deficient number, since it is larger than the sum of its proper divisors (1).

18274830108991 is an equidigital number, since it uses as much as digits as its factorization.

18274830108991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 61.

The spelling of 18274830108991 in words is "eighteen trillion, two hundred seventy-four billion, eight hundred thirty million, one hundred eight thousand, nine hundred ninety-one".