18294229 has 2 divisors, whose sum is σ = 18294230. Its totient is φ = 18294228.

The previous prime is 18294209. The next prime is 18294239. The reversal of 18294229 is 92249281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16793604 + 1500625 = 4098^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 18294229 - 2⁵ = 18294197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18294209) 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, 9147114 + 9147115.

It is an arithmetic number, because the mean of its divisors is an integer number (9147115).

Almost surely, 2^18294229 is an apocalyptic number.

It is an amenable number.

18294229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18294229 is an equidigital number, since it uses as much as digits as its factorization.

18294229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 18294229 is about 4277.1753529637. The cubic root of 18294229 is about 263.4943882951.

The spelling of 18294229 in words is "eighteen million, two hundred ninety-four thousand, two hundred twenty-nine".