18367324861 has 2 divisors, whose sum is σ = 18367324862. Its totient is φ = 18367324860.

The previous prime is 18367324817. The next prime is 18367324883. The reversal of 18367324861 is 16842376381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16772840100 + 1594484761 = 129510^2 + 39931^2 .

It is an emirp because it is prime and its reverse (16842376381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18367324861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18367324891) 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, 9183662430 + 9183662431.

It is an arithmetic number, because the mean of its divisors is an integer number (9183662431).

Almost surely, 2^18367324861 is an apocalyptic number.

It is an amenable number.

18367324861 is a deficient number, since it is larger than the sum of its proper divisors (1).

18367324861 is an equidigital number, since it uses as much as digits as its factorization.

18367324861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The spelling of 18367324861 in words is "eighteen billion, three hundred sixty-seven million, three hundred twenty-four thousand, eight hundred sixty-one".