18084229 has 2 divisors, whose sum is σ = 18084230. Its totient is φ = 18084228.

The previous prime is 18084223. The next prime is 18084247. The reversal of 18084229 is 92248081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 3629025 = 3802^2 + 1905^2 .

It is an emirp because it is prime and its reverse (92248081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18084229 - 2¹⁵ = 18051461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18084194 and 18084203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18084223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9042114 + 9042115.

It is an arithmetic number, because the mean of its divisors is an integer number (9042115).

Almost surely, 2^18084229 is an apocalyptic number.

It is an amenable number.

18084229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18084229 is an equidigital number, since it uses as much as digits as its factorization.

18084229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18084229 is about 4252.5555845868. Note that the first 4 decimals coincide. The cubic root of 18084229 is about 262.4822857283.

The spelling of 18084229 in words is "eighteen million, eighty-four thousand, two hundred twenty-nine".