18017141 has 2 divisors, whose sum is σ = 18017142. Its totient is φ = 18017140.

The previous prime is 18017123. The next prime is 18017147. The reversal of 18017141 is 14171081.

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., 17556100 + 461041 = 4190^2 + 679^2 .

It is a cyclic number.

It is not a de Polignac number, because 18017141 - 2¹⁴ = 18000757 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 (18017147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9008570 + 9008571.

It is an arithmetic number, because the mean of its divisors is an integer number (9008571).

Almost surely, 2^18017141 is an apocalyptic number.

It is an amenable number.

18017141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18017141 is an equidigital number, since it uses as much as digits as its factorization.

18017141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 18017141 is about 4244.6602926500. The cubic root of 18017141 is about 262.1573021548.

The spelling of 18017141 in words is "eighteen million, seventeen thousand, one hundred forty-one".