18396305923 has 2 divisors, whose sum is σ = 18396305924. Its totient is φ = 18396305922.

The previous prime is 18396305857. The next prime is 18396305969. The reversal of 18396305923 is 32950369381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18396305923 is a prime.

It is a super-2 number, since 2×18396305923² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18396302923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198152961 + 9198152962.

It is an arithmetic number, because the mean of its divisors is an integer number (9198152962).

Almost surely, 2^18396305923 is an apocalyptic number.

18396305923 is a deficient number, since it is larger than the sum of its proper divisors (1).

18396305923 is an equidigital number, since it uses as much as digits as its factorization.

18396305923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 18396305923 in words is "eighteen billion, three hundred ninety-six million, three hundred five thousand, nine hundred twenty-three".