18799271 has 2 divisors, whose sum is σ = 18799272. Its totient is φ = 18799270.

The previous prime is 18799247. The next prime is 18799327. The reversal of 18799271 is 17299781.

It is a weak prime.

It is an emirp because it is prime and its reverse (17299781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18799271 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 (18799241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399635 + 9399636.

It is an arithmetic number, because the mean of its divisors is an integer number (9399636).

Almost surely, 2^18799271 is an apocalyptic number.

18799271 is a deficient number, since it is larger than the sum of its proper divisors (1).

18799271 is an equidigital number, since it uses as much as digits as its factorization.

18799271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 18799271 is about 4335.8126112645. The cubic root of 18799271 is about 265.8971420961.

The spelling of 18799271 in words is "eighteen million, seven hundred ninety-nine thousand, two hundred seventy-one".