18082229 has 4 divisors (see below), whose sum is σ = 19726080. Its totient is φ = 16438380.

The previous prime is 18082217. The next prime is 18082241. The reversal of 18082229 is 92228081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (18082217) and next prime (18082241).

It is a cyclic number.

It is not a de Polignac number, because 18082229 - 2⁴ = 18082213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18082195 and 18082204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18082249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821909 + ... + 821930.

It is an arithmetic number, because the mean of its divisors is an integer number (4931520).

Almost surely, 2^18082229 is an apocalyptic number.

It is an amenable number.

18082229 is a deficient number, since it is larger than the sum of its proper divisors (1643851).

18082229 is a wasteful number, since it uses less digits than its factorization.

18082229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643850.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18082229 is about 4252.3204253678. The cubic root of 18082229 is about 262.4726090845.

The spelling of 18082229 in words is "eighteen million, eighty-two thousand, two hundred twenty-nine".