18844225 has 12 divisors (see below), whose sum is σ = 23502960. Its totient is φ = 14987600.

The previous prime is 18844207. The next prime is 18844283. The reversal of 18844225 is 52244881.

It is not a de Polignac number, because 18844225 - 2¹¹ = 18842177 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2370 + ... + 6580.

It is an arithmetic number, because the mean of its divisors is an integer number (1958580).

Almost surely, 2^18844225 is an apocalyptic number.

It is an amenable number.

18844225 is a deficient number, since it is larger than the sum of its proper divisors (4658735).

18844225 is a wasteful number, since it uses less digits than its factorization.

18844225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400 (or 4395 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 18844225 is about 4340.9935498685. The cubic root of 18844225 is about 266.1089167098.

The spelling of 18844225 in words is "eighteen million, eight hundred forty-four thousand, two hundred twenty-five".