18243360329 has 2 divisors, whose sum is σ = 18243360330. Its totient is φ = 18243360328.

The previous prime is 18243360301. The next prime is 18243360437. The reversal of 18243360329 is 92306334281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14661577225 + 3581783104 = 121085^2 + 59848^2 .

It is a cyclic number.

It is not a de Polignac number, because 18243360329 - 2²⁴ = 18226583113 is a prime.

It is not a weakly prime, because it can be changed into another prime (18243360029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121680164 + 9121680165.

It is an arithmetic number, because the mean of its divisors is an integer number (9121680165).

Almost surely, 2^18243360329 is an apocalyptic number.

It is an amenable number.

18243360329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18243360329 is an equidigital number, since it uses as much as digits as its factorization.

18243360329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 18243360329 in words is "eighteen billion, two hundred forty-three million, three hundred sixty thousand, three hundred twenty-nine".