18084013 has 2 divisors, whose sum is σ = 18084014. Its totient is φ = 18084012.

The previous prime is 18083987. The next prime is 18084041. The reversal of 18084013 is 31048081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227204 + 7856809 = 3198^2 + 2803^2 .

It is a cyclic number.

It is not a de Polignac number, because 18084013 - 2¹⁷ = 17952941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18004013) 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 as a sum of consecutive naturals, namely, 9042006 + 9042007.

It is an arithmetic number, because the mean of its divisors is an integer number (9042007).

Almost surely, 2^18084013 is an apocalyptic number.

It is an amenable number.

18084013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18084013 is an equidigital number, since it uses as much as digits as its factorization.

18084013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18084013 is about 4252.5301880175. The cubic root of 18084013 is about 262.4812406851.

The spelling of 18084013 in words is "eighteen million, eighty-four thousand, thirteen".