18091190213 has 2 divisors, whose sum is σ = 18091190214. Its totient is φ = 18091190212.

The previous prime is 18091190197. The next prime is 18091190261. The reversal of 18091190213 is 31209119081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18075995809 + 15194404 = 134447^2 + 3898^2 .

It is a cyclic number.

It is not a de Polignac number, because 18091190213 - 2⁴ = 18091190197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18091190813) 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, 9045595106 + 9045595107.

It is an arithmetic number, because the mean of its divisors is an integer number (9045595107).

Almost surely, 2^18091190213 is an apocalyptic number.

It is an amenable number.

18091190213 is a deficient number, since it is larger than the sum of its proper divisors (1).

18091190213 is an equidigital number, since it uses as much as digits as its factorization.

18091190213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 18091190213 in words is "eighteen billion, ninety-one million, one hundred ninety thousand, two hundred thirteen".