18414229 has 2 divisors, whose sum is σ = 18414230. Its totient is φ = 18414228.

The previous prime is 18414203. The next prime is 18414239. The reversal of 18414229 is 92241481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15421329 + 2992900 = 3927^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 18414229 - 2²³ = 10025621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18414229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18414239) 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, 9207114 + 9207115.

It is an arithmetic number, because the mean of its divisors is an integer number (9207115).

Almost surely, 2^18414229 is an apocalyptic number.

It is an amenable number.

18414229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18414229 is an equidigital number, since it uses as much as digits as its factorization.

18414229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 18414229 is about 4291.1803737433. The cubic root of 18414229 is about 264.0692588796.

The spelling of 18414229 in words is "eighteen million, four hundred fourteen thousand, two hundred twenty-nine".