18047422 has 8 divisors (see below), whose sum is σ = 27089496. Its totient is φ = 9017592.

The previous prime is 18047417. The next prime is 18047423. The reversal of 18047422 is 22474081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047423) by changing a digit.

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, 3133 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (3386187).

Almost surely, 2^18047422 is an apocalyptic number.

18047422 is a deficient number, since it is larger than the sum of its proper divisors (9042074).

18047422 is a wasteful number, since it uses less digits than its factorization.

18047422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 18047422 is about 4248.2257472973. The cubic root of 18047422 is about 262.3040872289.

The spelling of 18047422 in words is "eighteen million, forty-seven thousand, four hundred twenty-two".