18443622 has 8 divisors (see below), whose sum is σ = 36887256. Its totient is φ = 6147872.

The previous prime is 18443617. The next prime is 18443653. The reversal of 18443622 is 22634481.

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

18443622 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18443622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536963 + ... + 1536974.

It is an arithmetic number, because the mean of its divisors is an integer number (4610907).

Almost surely, 2^18443622 is an apocalyptic number.

18443622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18443622 is a wasteful number, since it uses less digits than its factorization.

18443622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073942.

The product of its digits is 9216, while the sum is 30.

The square root of 18443622 is about 4294.6038234044. The cubic root of 18443622 is about 264.2096876311.

The spelling of 18443622 in words is "eighteen million, four hundred forty-three thousand, six hundred twenty-two".