18828211 has 4 divisors (see below), whose sum is σ = 18837424. Its totient is φ = 18819000.

The previous prime is 18828203. The next prime is 18828239. The reversal of 18828211 is 11282881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11282881 = 3359².

It is a cyclic number.

It is not a de Polignac number, because 18828211 - 2³ = 18828203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18828011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15 + ... + 6136.

It is an arithmetic number, because the mean of its divisors is an integer number (4709356).

Almost surely, 2^18828211 is an apocalyptic number.

18828211 is a deficient number, since it is larger than the sum of its proper divisors (9213).

18828211 is an equidigital number, since it uses as much as digits as its factorization.

18828211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212.

The product of its digits is 2048, while the sum is 31.

The square root of 18828211 is about 4339.1486492168. The cubic root of 18828211 is about 266.0335147249.

The spelling of 18828211 in words is "eighteen million, eight hundred twenty-eight thousand, two hundred eleven".