18182365009 has 2 divisors, whose sum is σ = 18182365010. Its totient is φ = 18182365008.

The previous prime is 18182364947. The next prime is 18182365013. The reversal of 18182365009 is 90056328181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17661612609 + 520752400 = 132897^2 + 22820^2 .

It is a cyclic number.

It is not a de Polignac number, because 18182365009 - 2⁷ = 18182364881 is a prime.

It is not a weakly prime, because it can be changed into another prime (18182365109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091182504 + 9091182505.

It is an arithmetic number, because the mean of its divisors is an integer number (9091182505).

Almost surely, 2^18182365009 is an apocalyptic number.

It is an amenable number.

18182365009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182365009 is an equidigital number, since it uses as much as digits as its factorization.

18182365009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 18182365009 in words is "eighteen billion, one hundred eighty-two million, three hundred sixty-five thousand, nine".