18323623 has 2 divisors, whose sum is σ = 18323624. Its totient is φ = 18323622.

The previous prime is 18323611. The next prime is 18323647. The reversal of 18323623 is 32632381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18323623 - 2²¹ = 16226471 is a prime.

It is a super-2 number, since 2×18323623² = 671510319692258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18323591 and 18323600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18323653) 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, 9161811 + 9161812.

It is an arithmetic number, because the mean of its divisors is an integer number (9161812).

Almost surely, 2^18323623 is an apocalyptic number.

18323623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18323623 is an equidigital number, since it uses as much as digits as its factorization.

18323623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 18323623 is about 4280.6101200647. The cubic root of 18323623 is about 263.6354347713.

The spelling of 18323623 in words is "eighteen million, three hundred twenty-three thousand, six hundred twenty-three".