18411229 has 2 divisors, whose sum is σ = 18411230. Its totient is φ = 18411228.

The previous prime is 18411199. The next prime is 18411251. The reversal of 18411229 is 92211481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12236004 + 6175225 = 3498^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 18411229 - 2¹⁵ = 18378461 is a prime.

It is a Chen prime.

It is equal to p_1175905 and since 18411229 and 1175905 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18411197 and 18411206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18411269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9205614 + 9205615.

It is an arithmetic number, because the mean of its divisors is an integer number (9205615).

Almost surely, 2^18411229 is an apocalyptic number.

It is an amenable number.

18411229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18411229 is an equidigital number, since it uses as much as digits as its factorization.

18411229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 18411229 is about 4290.8308053336. The cubic root of 18411229 is about 264.0549176003.

The spelling of 18411229 in words is "eighteen million, four hundred eleven thousand, two hundred twenty-nine".