18026227 has 4 divisors (see below), whose sum is σ = 18810000. Its totient is φ = 17242456.

The previous prime is 18026219. The next prime is 18026249. The reversal of 18026227 is 72262081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72262081 = 1117 ⋅64693.

It is not a de Polignac number, because 18026227 - 2³ = 18026219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18026195 and 18026204.

It is not an unprimeable number, because it can be changed into a prime (18026257) 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, 391852 + ... + 391897.

It is an arithmetic number, because the mean of its divisors is an integer number (4702500).

Almost surely, 2^18026227 is an apocalyptic number.

18026227 is a deficient number, since it is larger than the sum of its proper divisors (783773).

18026227 is an equidigital number, since it uses as much as digits as its factorization.

18026227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783772.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18026227 is about 4245.7304436339. The cubic root of 18026227 is about 262.2013631771.

The spelling of 18026227 in words is "eighteen million, twenty-six thousand, two hundred twenty-seven".