18030923 has 2 divisors, whose sum is σ = 18030924. Its totient is φ = 18030922.

The previous prime is 18030911. The next prime is 18030959. The reversal of 18030923 is 32903081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18030923 - 2⁴ = 18030907 is a prime.

It is a super-2 number, since 2×18030923² = 650228368463858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 18030892 and 18030901.

It is not a weakly prime, because it can be changed into another prime (18030323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015461 + 9015462.

It is an arithmetic number, because the mean of its divisors is an integer number (9015462).

Almost surely, 2^18030923 is an apocalyptic number.

18030923 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030923 is an equidigital number, since it uses as much as digits as its factorization.

18030923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 18030923 is about 4246.2834337807. The cubic root of 18030923 is about 262.2241298325.

The spelling of 18030923 in words is "eighteen million, thirty thousand, nine hundred twenty-three".