18550227 has 16 divisors (see below), whose sum is σ = 25920000. Its totient is φ = 11784864.

The previous prime is 18550219. The next prime is 18550229. The reversal of 18550227 is 72205581.

It is not a de Polignac number, because 18550227 - 2³ = 18550219 is a prime.

It is a super-2 number, since 2×18550227² = 688221843503058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18550194 and 18550203.

It is not an unprimeable number, because it can be changed into a prime (18550229) 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 15 ways as a sum of consecutive naturals, for example, 5524 + ... + 8222.

It is an arithmetic number, because the mean of its divisors is an integer number (1620000).

Almost surely, 2^18550227 is an apocalyptic number.

18550227 is a deficient number, since it is larger than the sum of its proper divisors (7369773).

18550227 is a wasteful number, since it uses less digits than its factorization.

18550227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 18550227 is about 4306.9974460174. The cubic root of 18550227 is about 264.7177581222.

The spelling of 18550227 in words is "eighteen million, five hundred fifty thousand, two hundred twenty-seven".