18264361 has 2 divisors, whose sum is σ = 18264362. Its totient is φ = 18264360.

The previous prime is 18264349. The next prime is 18264397. The reversal of 18264361 is 16346281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 40000 = 4269^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 18264361 - 2⁹ = 18263849 is a prime.

It is not a weakly prime, because it can be changed into another prime (18264661) 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, 9132180 + 9132181.

It is an arithmetic number, because the mean of its divisors is an integer number (9132181).

Almost surely, 2^18264361 is an apocalyptic number.

It is an amenable number.

18264361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18264361 is an equidigital number, since it uses as much as digits as its factorization.

18264361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 18264361 is about 4273.6823700411. The cubic root of 18264361 is about 263.3509124977.

The spelling of 18264361 in words is "eighteen million, two hundred sixty-four thousand, three hundred sixty-one".