18748227 has 4 divisors (see below), whose sum is σ = 24997640. Its totient is φ = 12498816.

The previous prime is 18748207. The next prime is 18748241. The reversal of 18748227 is 72284781.

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

It is not a de Polignac number, because 18748227 - 2¹⁶ = 18682691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18748207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3124702 + ... + 3124707.

It is an arithmetic number, because the mean of its divisors is an integer number (6249410).

Almost surely, 2^18748227 is an apocalyptic number.

18748227 is a deficient number, since it is larger than the sum of its proper divisors (6249413).

18748227 is an equidigital number, since it uses as much as digits as its factorization.

18748227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249412.

The product of its digits is 50176, while the sum is 39.

The square root of 18748227 is about 4329.9222856767. The cubic root of 18748227 is about 265.6562682822.

It can be divided in two parts, 1874 and 8227, that added together give a palindrome (10101).

The spelling of 18748227 in words is "eighteen million, seven hundred forty-eight thousand, two hundred twenty-seven".