18570227 has 6 divisors (see below), whose sum is σ = 20108772. Its totient is φ = 17141592.

The previous prime is 18570197. The next prime is 18570229. The reversal of 18570227 is 72207581.

It is not a de Polignac number, because 18570227 - 2¹⁰ = 18569203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18570193 and 18570202.

It is not an unprimeable number, because it can be changed into a prime (18570229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54773 + ... + 55110.

It is an arithmetic number, because the mean of its divisors is an integer number (3351462).

Almost surely, 2^18570227 is an apocalyptic number.

18570227 is a deficient number, since it is larger than the sum of its proper divisors (1538545).

18570227 is a wasteful number, since it uses less digits than its factorization.

18570227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109909 (or 109896 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18570227 is about 4309.3186236341. The cubic root of 18570227 is about 264.8128594489.

The spelling of 18570227 in words is "eighteen million, five hundred seventy thousand, two hundred twenty-seven".