18507941 has 2 divisors, whose sum is σ = 18507942. Its totient is φ = 18507940.

The previous prime is 18507913. The next prime is 18507977. The reversal of 18507941 is 14970581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13535041 + 4972900 = 3679^2 + 2230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18507941 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 (18507901) 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, 9253970 + 9253971.

It is an arithmetic number, because the mean of its divisors is an integer number (9253971).

Almost surely, 2^18507941 is an apocalyptic number.

It is an amenable number.

18507941 is a deficient number, since it is larger than the sum of its proper divisors (1).

18507941 is an equidigital number, since it uses as much as digits as its factorization.

18507941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18507941 is about 4302.0856569808. The cubic root of 18507941 is about 264.5164601089.

The spelling of 18507941 in words is "eighteen million, five hundred seven thousand, nine hundred forty-one".