18216622 has 8 divisors (see below), whose sum is σ = 28932336. Its totient is φ = 8572512.

The previous prime is 18216599. The next prime is 18216637. The reversal of 18216622 is 22661281.

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

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, 267858 + ... + 267925.

It is an arithmetic number, because the mean of its divisors is an integer number (3616542).

Almost surely, 2^18216622 is an apocalyptic number.

18216622 is a deficient number, since it is larger than the sum of its proper divisors (10715714).

18216622 is a wasteful number, since it uses less digits than its factorization.

18216622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535802.

The product of its digits is 2304, while the sum is 28.

The square root of 18216622 is about 4268.0934853867. The cubic root of 18216622 is about 263.1212652863.

The spelling of 18216622 in words is "eighteen million, two hundred sixteen thousand, six hundred twenty-two".