18222718831 has 2 divisors, whose sum is σ = 18222718832. Its totient is φ = 18222718830.

The previous prime is 18222718793. The next prime is 18222718853. The reversal of 18222718831 is 13881722281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18222718831 is a prime.

It is a super-2 number, since 2×18222718831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18222718331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111359415 + 9111359416.

It is an arithmetic number, because the mean of its divisors is an integer number (9111359416).

Almost surely, 2^18222718831 is an apocalyptic number.

18222718831 is a deficient number, since it is larger than the sum of its proper divisors (1).

18222718831 is an equidigital number, since it uses as much as digits as its factorization.

18222718831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 43.

The spelling of 18222718831 in words is "eighteen billion, two hundred twenty-two million, seven hundred eighteen thousand, eight hundred thirty-one".