18108494213 has 2 divisors, whose sum is σ = 18108494214. Its totient is φ = 18108494212.

The previous prime is 18108494171. The next prime is 18108494227. The reversal of 18108494213 is 31249480181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10160236804 + 7948257409 = 100798^2 + 89153^2 .

It is a cyclic number.

It is not a de Polignac number, because 18108494213 - 2¹⁶ = 18108428677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18108494233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9054247106 + 9054247107.

It is an arithmetic number, because the mean of its divisors is an integer number (9054247107).

Almost surely, 2^18108494213 is an apocalyptic number.

It is an amenable number.

18108494213 is a deficient number, since it is larger than the sum of its proper divisors (1).

18108494213 is an equidigital number, since it uses as much as digits as its factorization.

18108494213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 18108494213 in words is "eighteen billion, one hundred eight million, four hundred ninety-four thousand, two hundred thirteen".