18442227 has 8 divisors (see below), whose sum is σ = 25161664. Its totient is φ = 12008808.

The previous prime is 18442223. The next prime is 18442247. The reversal of 18442227 is 72224481.

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

It is not a de Polignac number, because 18442227 - 2² = 18442223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18442194 and 18442203.

It is not an unprimeable number, because it can be changed into a prime (18442223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71353 + ... + 71610.

It is an arithmetic number, because the mean of its divisors is an integer number (3145208).

Almost surely, 2^18442227 is an apocalyptic number.

18442227 is a deficient number, since it is larger than the sum of its proper divisors (6719437).

18442227 is a wasteful number, since it uses less digits than its factorization.

18442227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143009.

The product of its digits is 7168, while the sum is 30.

The square root of 18442227 is about 4294.4414072147. The cubic root of 18442227 is about 264.2030262171.

The spelling of 18442227 in words is "eighteen million, four hundred forty-two thousand, two hundred twenty-seven".