18308123 has 2 divisors, whose sum is σ = 18308124. Its totient is φ = 18308122.

The previous prime is 18308093. The next prime is 18308137. The reversal of 18308123 is 32180381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18308123 - 2¹⁰ = 18307099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18308092 and 18308101.

It is not a weakly prime, because it can be changed into another prime (18308183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9154061 + 9154062.

It is an arithmetic number, because the mean of its divisors is an integer number (9154062).

Almost surely, 2^18308123 is an apocalyptic number.

18308123 is a deficient number, since it is larger than the sum of its proper divisors (1).

18308123 is an equidigital number, since it uses as much as digits as its factorization.

18308123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18308123 is about 4278.7992474525. The cubic root of 18308123 is about 263.5610771693.

The spelling of 18308123 in words is "eighteen million, three hundred eight thousand, one hundred twenty-three".