18873227 has 2 divisors, whose sum is σ = 18873228. Its totient is φ = 18873226.

The previous prime is 18873199. The next prime is 18873299. The reversal of 18873227 is 72237881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18873227 - 2¹⁸ = 18611083 is a prime.

It is not a weakly prime, because it can be changed into another prime (18873527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9436613 + 9436614.

It is an arithmetic number, because the mean of its divisors is an integer number (9436614).

Almost surely, 2^18873227 is an apocalyptic number.

18873227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18873227 is an equidigital number, since it uses as much as digits as its factorization.

18873227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 18873227 is about 4344.3327450830. The cubic root of 18873227 is about 266.2453640813.

The spelling of 18873227 in words is "eighteen million, eight hundred seventy-three thousand, two hundred twenty-seven".