18869218211 has 2 divisors, whose sum is σ = 18869218212. Its totient is φ = 18869218210.

The previous prime is 18869218183. The next prime is 18869218219. The reversal of 18869218211 is 11281296881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18869218211 is a prime.

It is not a weakly prime, because it can be changed into another prime (18869218219) 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, 9434609105 + 9434609106.

It is an arithmetic number, because the mean of its divisors is an integer number (9434609106).

Almost surely, 2^18869218211 is an apocalyptic number.

18869218211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18869218211 is an equidigital number, since it uses as much as digits as its factorization.

18869218211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 47.

The spelling of 18869218211 in words is "eighteen billion, eight hundred sixty-nine million, two hundred eighteen thousand, two hundred eleven".