18411227 has 4 divisors (see below), whose sum is σ = 18498696. Its totient is φ = 18323760.

The previous prime is 18411199. The next prime is 18411229. The reversal of 18411227 is 72211481.

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 18411227 - 2¹² = 18407131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18411196 and 18411205.

It is not an unprimeable number, because it can be changed into a prime (18411229) 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, 43418 + ... + 43839.

It is an arithmetic number, because the mean of its divisors is an integer number (4624674).

Almost surely, 2^18411227 is an apocalyptic number.

18411227 is a deficient number, since it is larger than the sum of its proper divisors (87469).

18411227 is an equidigital number, since it uses as much as digits as its factorization.

18411227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87468.

The product of its digits is 896, while the sum is 26.

The square root of 18411227 is about 4290.8305722785. The cubic root of 18411227 is about 264.0549080389.

It can be divided in two parts, 184 and 11227, that added together give a palindrome (11411).

The spelling of 18411227 in words is "eighteen million, four hundred eleven thousand, two hundred twenty-seven".