18264481 has 2 divisors, whose sum is σ = 18264482. Its totient is φ = 18264480.

The previous prime is 18264479. The next prime is 18264497. The reversal of 18264481 is 18446281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 6974881 = 3360^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 18264481 - 2¹ = 18264479 is a prime.

It is a super-2 number, since 2×18264481² = 667182532398722, which contains 22 as substring.

Together with 18264479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18264451) 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, 9132240 + 9132241.

It is an arithmetic number, because the mean of its divisors is an integer number (9132241).

Almost surely, 2^18264481 is an apocalyptic number.

It is an amenable number.

18264481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18264481 is an equidigital number, since it uses as much as digits as its factorization.

18264481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 34.

The square root of 18264481 is about 4273.6964094329. The cubic root of 18264481 is about 263.3514892501.

The spelling of 18264481 in words is "eighteen million, two hundred sixty-four thousand, four hundred eighty-one".