18045439 has 2 divisors, whose sum is σ = 18045440. Its totient is φ = 18045438.

The previous prime is 18045437. The next prime is 18045451. The reversal of 18045439 is 93454081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18045439 - 2¹ = 18045437 is a prime.

Together with 18045437, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18045437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022719 + 9022720.

It is an arithmetic number, because the mean of its divisors is an integer number (9022720).

Almost surely, 2^18045439 is an apocalyptic number.

18045439 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045439 is an equidigital number, since it uses as much as digits as its factorization.

18045439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18045439 is about 4247.9923493340. The cubic root of 18045439 is about 262.2944797984.

The spelling of 18045439 in words is "eighteen million, forty-five thousand, four hundred thirty-nine".