18365706841 has 2 divisors, whose sum is σ = 18365706842. Its totient is φ = 18365706840.

The previous prime is 18365706811. The next prime is 18365706847. The reversal of 18365706841 is 14860756381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16501971600 + 1863735241 = 128460^2 + 43171^2 .

It is a cyclic number.

It is not a de Polignac number, because 18365706841 - 2²⁵ = 18332152409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18365706847) 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, 9182853420 + 9182853421.

It is an arithmetic number, because the mean of its divisors is an integer number (9182853421).

Almost surely, 2^18365706841 is an apocalyptic number.

It is an amenable number.

18365706841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18365706841 is an equidigital number, since it uses as much as digits as its factorization.

18365706841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 18365706841 in words is "eighteen billion, three hundred sixty-five million, seven hundred six thousand, eight hundred forty-one".