18364039 has 2 divisors, whose sum is σ = 18364040. Its totient is φ = 18364038.

The previous prime is 18364037. The next prime is 18364057. The reversal of 18364039 is 93046381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18364039 - 2¹ = 18364037 is a prime.

Together with 18364037, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18363995 and 18364013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18364033) 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, 9182019 + 9182020.

It is an arithmetic number, because the mean of its divisors is an integer number (9182020).

Almost surely, 2^18364039 is an apocalyptic number.

18364039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18364039 is an equidigital number, since it uses as much as digits as its factorization.

18364039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 18364039 is about 4285.3283421460. The cubic root of 18364039 is about 263.8291240037.

The spelling of 18364039 in words is "eighteen million, three hundred sixty-four thousand, thirty-nine".