18294257 has 2 divisors, whose sum is σ = 18294258. Its totient is φ = 18294256.

The previous prime is 18294253. The next prime is 18294259. The reversal of 18294257 is 75249281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14258176 + 4036081 = 3776^2 + 2009^2 .

It is an emirp because it is prime and its reverse (75249281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18294257 - 2² = 18294253 is a prime.

Together with 18294259, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18294257.

It is not a weakly prime, because it can be changed into another prime (18294253) 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, 9147128 + 9147129.

It is an arithmetic number, because the mean of its divisors is an integer number (9147129).

Almost surely, 2^18294257 is an apocalyptic number.

It is an amenable number.

18294257 is a deficient number, since it is larger than the sum of its proper divisors (1).

18294257 is an equidigital number, since it uses as much as digits as its factorization.

18294257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 18294257 is about 4277.1786261507. The cubic root of 18294257 is about 263.4945227244.

The spelling of 18294257 in words is "eighteen million, two hundred ninety-four thousand, two hundred fifty-seven".