18213326 has 8 divisors (see below), whose sum is σ = 27575640. Its totient is φ = 9021448.

The previous prime is 18213317. The next prime is 18213353. The reversal of 18213326 is 62331281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18213295 and 18213304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42341 + ... + 42768.

It is an arithmetic number, because the mean of its divisors is an integer number (3446955).

Almost surely, 2^18213326 is an apocalyptic number.

18213326 is a deficient number, since it is larger than the sum of its proper divisors (9362314).

18213326 is a wasteful number, since it uses less digits than its factorization.

18213326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85218.

The product of its digits is 1728, while the sum is 26.

The square root of 18213326 is about 4267.7073470424. The cubic root of 18213326 is about 263.1053951650.

The spelling of 18213326 in words is "eighteen million, two hundred thirteen thousand, three hundred twenty-six".