18435229 has 2 divisors, whose sum is σ = 18435230. Its totient is φ = 18435228.

The previous prime is 18435223. The next prime is 18435239. The reversal of 18435229 is 92253481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 3980025 = 3802^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 18435229 - 2⁷ = 18435101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18435194 and 18435203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18435223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9217614 + 9217615.

It is an arithmetic number, because the mean of its divisors is an integer number (9217615).

Almost surely, 2^18435229 is an apocalyptic number.

It is an amenable number.

18435229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18435229 is an equidigital number, since it uses as much as digits as its factorization.

18435229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 18435229 is about 4293.6265557219. The cubic root of 18435229 is about 264.1696042469.

The spelling of 18435229 in words is "eighteen million, four hundred thirty-five thousand, two hundred twenty-nine".