18005704 has 8 divisors (see below), whose sum is σ = 33760710. Its totient is φ = 9002848.

The previous prime is 18005681. The next prime is 18005707. The reversal of 18005704 is 40750081.

It can be written as a sum of positive squares in only one way, i.e., 10876804 + 7128900 = 3298^2 + 2670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18005707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125349 + ... + 1125364.

Almost surely, 2^18005704 is an apocalyptic number.

It is an amenable number.

18005704 is a deficient number, since it is larger than the sum of its proper divisors (15755006).

18005704 is a wasteful number, since it uses less digits than its factorization.

18005704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250719 (or 2250715 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18005704 is about 4243.3128567194. The cubic root of 18005704 is about 262.1018192916.

Adding to 18005704 its reverse (40750081), we get a palindrome (58755785).

The spelling of 18005704 in words is "eighteen million, five thousand, seven hundred four".