18007568 has 10 divisors (see below), whose sum is σ = 34889694. Its totient is φ = 9003776.

The previous prime is 18007553. The next prime is 18007601. The reversal of 18007568 is 86570081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 300304 = 4208^2 + 548^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562721 + ... + 562752.

Almost surely, 2^18007568 is an apocalyptic number.

It is an amenable number.

18007568 is a deficient number, since it is larger than the sum of its proper divisors (16882126).

18007568 is a wasteful number, since it uses less digits than its factorization.

18007568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125481 (or 1125475 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 18007568 is about 4243.5324907440. The cubic root of 18007568 is about 262.1108634799.

The spelling of 18007568 in words is "eighteen million, seven thousand, five hundred sixty-eight".