18222684 has 24 divisors (see below), whose sum is σ = 42618240. Its totient is φ = 6060144.

The previous prime is 18222683. The next prime is 18222689. The reversal of 18222684 is 48622281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4527 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (1775760).

Almost surely, 2^18222684 is an apocalyptic number.

It is an amenable number.

18222684 is an abundant number, since it is smaller than the sum of its proper divisors (24395556).

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

18222684 is a wasteful number, since it uses less digits than its factorization.

18222684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529 (or 3527 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 18222684 is about 4268.8035794588. The cubic root of 18222684 is about 263.1504486005.

The spelling of 18222684 in words is "eighteen million, two hundred twenty-two thousand, six hundred eighty-four".