18084227 has 4 divisors (see below), whose sum is σ = 20667696. Its totient is φ = 15500760.

The previous prime is 18084223. The next prime is 18084229. The reversal of 18084227 is 72248081.

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 18084227 - 2² = 18084223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18084193 and 18084202.

It is not an unprimeable number, because it can be changed into a prime (18084223) 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, 1291724 + ... + 1291737.

It is an arithmetic number, because the mean of its divisors is an integer number (5166924).

Almost surely, 2^18084227 is an apocalyptic number.

18084227 is a deficient number, since it is larger than the sum of its proper divisors (2583469).

18084227 is an equidigital number, since it uses as much as digits as its factorization.

18084227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583468.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18084227 is about 4252.5553494340. Note that the first 3 decimals coincide. The cubic root of 18084227 is about 262.4822760520.

The spelling of 18084227 in words is "eighteen million, eighty-four thousand, two hundred twenty-seven".