18224768 has 16 divisors (see below), whose sum is σ = 36307410. Its totient is φ = 9112320.

The previous prime is 18224761. The next prime is 18224771. The reversal of 18224768 is 86742281.

It can be written as a sum of positive squares in only one way, i.e., 15429184 + 2795584 = 3928^2 + 1672^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18224761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71063 + ... + 71318.

Almost surely, 2^18224768 is an apocalyptic number.

It is an amenable number.

18224768 is a deficient number, since it is larger than the sum of its proper divisors (18082642).

18224768 is an equidigital number, since it uses as much as digits as its factorization.

18224768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142395 (or 142383 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 18224768 is about 4269.0476689772. The cubic root of 18224768 is about 263.1604797725.

The spelling of 18224768 in words is "eighteen million, two hundred twenty-four thousand, seven hundred sixty-eight".