18014281 has 2 divisors, whose sum is σ = 18014282. Its totient is φ = 18014280.

The previous prime is 18014279. The next prime is 18014287. The reversal of 18014281 is 18241081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12538681 + 5475600 = 3541^2 + 2340^2 .

It is an emirp because it is prime and its reverse (18241081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18014281 - 2¹ = 18014279 is a prime.

It is a super-2 number, since 2×18014281² = 649028639893922, which contains 22 as substring.

Together with 18014279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18014287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9007140 + 9007141.

It is an arithmetic number, because the mean of its divisors is an integer number (9007141).

Almost surely, 2^18014281 is an apocalyptic number.

It is an amenable number.

18014281 is a deficient number, since it is larger than the sum of its proper divisors (1).

18014281 is an equidigital number, since it uses as much as digits as its factorization.

18014281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18014281 is about 4244.3233854173. The cubic root of 18014281 is about 262.1434300028.

The spelling of 18014281 in words is "eighteen million, fourteen thousand, two hundred eighty-one".