18536227 has 4 divisors (see below), whose sum is σ = 18719856. Its totient is φ = 18352600.

The previous prime is 18536201. The next prime is 18536261. The reversal of 18536227 is 72263581.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18536227 is a prime.

It is a super-2 number, since 2×18536227² = 687183422791058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18536192 and 18536201.

It is not an unprimeable number, because it can be changed into a prime (18536527) 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, 91663 + ... + 91864.

It is an arithmetic number, because the mean of its divisors is an integer number (4679964).

Almost surely, 2^18536227 is an apocalyptic number.

18536227 is a deficient number, since it is larger than the sum of its proper divisors (183629).

18536227 is a wasteful number, since it uses less digits than its factorization.

18536227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183628.

The product of its digits is 20160, while the sum is 34.

The square root of 18536227 is about 4305.3718770856. The cubic root of 18536227 is about 264.6511465145.

The spelling of 18536227 in words is "eighteen million, five hundred thirty-six thousand, two hundred twenty-seven".