18617141 has 2 divisors, whose sum is σ = 18617142. Its totient is φ = 18617140.

The previous prime is 18617099. The next prime is 18617153. The reversal of 18617141 is 14171681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 8726116 = 3145^2 + 2954^2 .

It is a cyclic number.

It is not a de Polignac number, because 18617141 - 2⁶ = 18617077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18617161) 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, 9308570 + 9308571.

It is an arithmetic number, because the mean of its divisors is an integer number (9308571).

Almost surely, 2^18617141 is an apocalyptic number.

It is an amenable number.

18617141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18617141 is an equidigital number, since it uses as much as digits as its factorization.

18617141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 18617141 is about 4314.7585100443. The cubic root of 18617141 is about 265.0356710022.

The spelling of 18617141 in words is "eighteen million, six hundred seventeen thousand, one hundred forty-one".