18340241 has 2 divisors, whose sum is σ = 18340242. Its totient is φ = 18340240.

The previous prime is 18340237. The next prime is 18340247. The reversal of 18340241 is 14204381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13845841 + 4494400 = 3721^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 18340241 - 2² = 18340237 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18340247) 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, 9170120 + 9170121.

It is an arithmetic number, because the mean of its divisors is an integer number (9170121).

Almost surely, 2^18340241 is an apocalyptic number.

It is an amenable number.

18340241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18340241 is an equidigital number, since it uses as much as digits as its factorization.

18340241 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 23.

The square root of 18340241 is about 4282.5507586017. The cubic root of 18340241 is about 263.7151091511.

It can be divided in two parts, 18340 and 241, that added together give a palindrome (18581).

The spelling of 18340241 in words is "eighteen million, three hundred forty thousand, two hundred forty-one".