18324321 has 8 divisors (see below), whose sum is σ = 25000800. Its totient is φ = 11932032.

The previous prime is 18324311. The next prime is 18324331. The reversal of 18324321 is 12342381.

It is an interprime number because it is at equal distance from previous prime (18324311) and next prime (18324331).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18324321 - 2¹⁴ = 18307937 is a prime.

It is a super-2 number, since 2×18324321² = 671561480222082, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18324291 and 18324300.

It is not an unprimeable number, because it can be changed into a prime (18324311) 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 in 7 ways as a sum of consecutive naturals, for example, 70896 + ... + 71153.

It is an arithmetic number, because the mean of its divisors is an integer number (3125100).

Almost surely, 2^18324321 is an apocalyptic number.

It is an amenable number.

18324321 is a deficient number, since it is larger than the sum of its proper divisors (6676479).

18324321 is a wasteful number, since it uses less digits than its factorization.

18324321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142095.

The product of its digits is 1152, while the sum is 24.

The square root of 18324321 is about 4280.6916497220. The cubic root of 18324321 is about 263.6387822752.

The spelling of 18324321 in words is "eighteen million, three hundred twenty-four thousand, three hundred twenty-one".