18226 has 8 divisors (see below), whose sum is σ = 29484.
Its totient is φ = 8400.
The previous prime is 18223. The next prime is 18229. The reversal of 18226 is 62281.
It is a happy number.
18226 is nontrivially palindromic in base 5 and base 12.
It is a Cunningham number, because it is equal to 1352+1.
It is an interprime number because it is at equal distance from previous prime (18223) and next prime (18229).
It can be written as a sum of positive squares in 2 ways, for example, as 18225 + 1 = 135^2 + 1^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (18223) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325 + ... + 376.
218226 is an apocalyptic number.
18226 is a deficient number, since it is larger than the sum of its proper divisors (11258).
18226 is a wasteful number, since it uses less digits than its factorization.
18226 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 716.
The product of its digits is 192, while the sum is 19.
The square root of 18226 is about 135.0037036529.
The cubic root of 18226 is about 26.3166409549.
The spelling of 18226 in words is "eighteen thousand, two hundred twenty-six".