18343312303 has 2 divisors, whose sum is σ = 18343312304. Its totient is φ = 18343312302.

The previous prime is 18343312277. The next prime is 18343312331. The reversal of 18343312303 is 30321334381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18343312303 - 2²⁵ = 18309757871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18343312373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171656151 + 9171656152.

It is an arithmetic number, because the mean of its divisors is an integer number (9171656152).

Almost surely, 2^18343312303 is an apocalyptic number.

18343312303 is a deficient number, since it is larger than the sum of its proper divisors (1).

18343312303 is an equidigital number, since it uses as much as digits as its factorization.

18343312303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 18343312303 its reverse (30321334381), we get a palindrome (48664646684).

The spelling of 18343312303 in words is "eighteen billion, three hundred forty-three million, three hundred twelve thousand, three hundred three".