18441227 has 4 divisors (see below), whose sum is σ = 21075696. Its totient is φ = 15806760.

The previous prime is 18441169. The next prime is 18441233. The reversal of 18441227 is 72214481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18441227 - 2¹² = 18437131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18441227.

It is not an unprimeable number, because it can be changed into a prime (18441427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317224 + ... + 1317237.

It is an arithmetic number, because the mean of its divisors is an integer number (5268924).

Almost surely, 2^18441227 is an apocalyptic number.

18441227 is a deficient number, since it is larger than the sum of its proper divisors (2634469).

18441227 is an equidigital number, since it uses as much as digits as its factorization.

18441227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634468.

The product of its digits is 3584, while the sum is 29.

The square root of 18441227 is about 4294.3249760585. The cubic root of 18441227 is about 264.1982508032.

The spelling of 18441227 in words is "eighteen million, four hundred forty-one thousand, two hundred twenty-seven".