18043741 has 2 divisors, whose sum is σ = 18043742. Its totient is φ = 18043740.

The previous prime is 18043733. The next prime is 18043747. The reversal of 18043741 is 14734081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 23716 = 4245^2 + 154^2 .

It is an emirp because it is prime and its reverse (14734081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18043741 - 2³ = 18043733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18043747) 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, 9021870 + 9021871.

It is an arithmetic number, because the mean of its divisors is an integer number (9021871).

Almost surely, 2^18043741 is an apocalyptic number.

It is an amenable number.

18043741 is a deficient number, since it is larger than the sum of its proper divisors (1).

18043741 is an equidigital number, since it uses as much as digits as its factorization.

18043741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18043741 is about 4247.7924855153. The cubic root of 18043741 is about 262.2862526041.

The spelling of 18043741 in words is "eighteen million, forty-three thousand, seven hundred forty-one".