18005224 has 16 divisors (see below), whose sum is σ = 34089120. Its totient is φ = 8914800.

The previous prime is 18005189. The next prime is 18005233. The reversal of 18005224 is 42250081.

It is a junction number, because it is equal to n+sod(n) for n = 18005195 and 18005204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10102 + ... + 11749.

It is an arithmetic number, because the mean of its divisors is an integer number (2130570).

Almost surely, 2^18005224 is an apocalyptic number.

It is an amenable number.

18005224 is a deficient number, since it is larger than the sum of its proper divisors (16083896).

18005224 is a wasteful number, since it uses less digits than its factorization.

18005224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21960 (or 21956 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18005224 is about 4243.2562967608. The cubic root of 18005224 is about 262.0994902150.

The spelling of 18005224 in words is "eighteen million, five thousand, two hundred twenty-four".