18471249227 has 2 divisors, whose sum is σ = 18471249228. Its totient is φ = 18471249226.

The previous prime is 18471249217. The next prime is 18471249257. The reversal of 18471249227 is 72294217481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18471249227 - 2⁴ = 18471249211 is a prime.

It is not a weakly prime, because it can be changed into another prime (18471249217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9235624613 + 9235624614.

It is an arithmetic number, because the mean of its divisors is an integer number (9235624614).

Almost surely, 2^18471249227 is an apocalyptic number.

18471249227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18471249227 is an equidigital number, since it uses as much as digits as its factorization.

18471249227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 47.

The spelling of 18471249227 in words is "eighteen billion, four hundred seventy-one million, two hundred forty-nine thousand, two hundred twenty-seven".