18714281 has 2 divisors, whose sum is σ = 18714282. Its totient is φ = 18714280.

The previous prime is 18714257. The next prime is 18714299. The reversal of 18714281 is 18241781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 1032256 = 4205^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 18714281 - 2⁶ = 18714217 is a prime.

It is a super-2 number, since 2×18714281² = 700448626693922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18714211) 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, 9357140 + 9357141.

It is an arithmetic number, because the mean of its divisors is an integer number (9357141).

Almost surely, 2^18714281 is an apocalyptic number.

It is an amenable number.

18714281 is a deficient number, since it is larger than the sum of its proper divisors (1).

18714281 is an equidigital number, since it uses as much as digits as its factorization.

18714281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 32.

The square root of 18714281 is about 4326.0005779010. Note that the first 3 decimals coincide. The cubic root of 18714281 is about 265.4958368294.

The spelling of 18714281 in words is "eighteen million, seven hundred fourteen thousand, two hundred eighty-one".