18216126 has 12 divisors (see below), whose sum is σ = 39468312. Its totient is φ = 6072036.

The previous prime is 18216113. The next prime is 18216137. The reversal of 18216126 is 62161281.

It is a self number, because there is not a number n which added to its sum of digits gives 18216126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505986 + ... + 506021.

It is an arithmetic number, because the mean of its divisors is an integer number (3289026).

Almost surely, 2^18216126 is an apocalyptic number.

18216126 is an abundant number, since it is smaller than the sum of its proper divisors (21252186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18216126 is a wasteful number, since it uses less digits than its factorization.

18216126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012015 (or 1012012 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 18216126 is about 4268.0353794222. The cubic root of 18216126 is about 263.1188771865.

The spelling of 18216126 in words is "eighteen million, two hundred sixteen thousand, one hundred twenty-six".