18168448 has 16 divisors (see below), whose sum is σ = 36195210. Its totient is φ = 9084160.

The previous prime is 18168439. The next prime is 18168467. The reversal of 18168448 is 84486181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12446784 + 5721664 = 3528^2 + 2392^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 18168448.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70843 + ... + 71098.

Almost surely, 2^18168448 is an apocalyptic number.

It is an amenable number.

18168448 is a deficient number, since it is larger than the sum of its proper divisors (18026762).

18168448 is an equidigital number, since it uses as much as digits as its factorization.

18168448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141955 (or 141943 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 18168448 is about 4262.4462459954. The cubic root of 18168448 is about 262.8891184434.

The spelling of 18168448 in words is "eighteen million, one hundred sixty-eight thousand, four hundred forty-eight".