18343229 has 2 divisors, whose sum is σ = 18343230. Its totient is φ = 18343228.

The previous prime is 18343219. The next prime is 18343267. The reversal of 18343229 is 92234381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 996004 = 4165^2 + 998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18343229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18343195 and 18343204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18343219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171614 + 9171615.

It is an arithmetic number, because the mean of its divisors is an integer number (9171615).

Almost surely, 2^18343229 is an apocalyptic number.

It is an amenable number.

18343229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18343229 is an equidigital number, since it uses as much as digits as its factorization.

18343229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 18343229 is about 4282.8996019052. The cubic root of 18343229 is about 263.7294299000.

The spelling of 18343229 in words is "eighteen million, three hundred forty-three thousand, two hundred twenty-nine".