18068849 has 2 divisors, whose sum is σ = 18068850. Its totient is φ = 18068848.

The previous prime is 18068837. The next prime is 18068857. The reversal of 18068849 is 94886081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 2608225 = 3932^2 + 1615^2 .

It is an emirp because it is prime and its reverse (94886081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18068849 - 2¹⁶ = 18003313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18068819) 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, 9034424 + 9034425.

It is an arithmetic number, because the mean of its divisors is an integer number (9034425).

Almost surely, 2^18068849 is an apocalyptic number.

It is an amenable number.

18068849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18068849 is an equidigital number, since it uses as much as digits as its factorization.

18068849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18068849 is about 4250.7468755502. The cubic root of 18068849 is about 262.4078539765.

The spelling of 18068849 in words is "eighteen million, sixty-eight thousand, eight hundred forty-nine".