18369227 has 4 divisors (see below), whose sum is σ = 18382896. Its totient is φ = 18355560.

The previous prime is 18369187. The next prime is 18369233. The reversal of 18369227 is 72296381.

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 18369227 - 2¹² = 18365131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18369287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4568 + ... + 7589.

It is an arithmetic number, because the mean of its divisors is an integer number (4595724).

Almost surely, 2^18369227 is an apocalyptic number.

18369227 is a deficient number, since it is larger than the sum of its proper divisors (13669).

18369227 is a wasteful number, since it uses less digits than its factorization.

18369227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13668.

The product of its digits is 36288, while the sum is 38.

The square root of 18369227 is about 4285.9336205779. The cubic root of 18369227 is about 263.8539663350.

The spelling of 18369227 in words is "eighteen million, three hundred sixty-nine thousand, two hundred twenty-seven".