18530004 has 12 divisors (see below), whose sum is σ = 43236704. Its totient is φ = 6176664.

The previous prime is 18529981. The next prime is 18530011. The reversal of 18530004 is 40003581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18530004² = 686722096480032, which contains 22 as substring.

It is a congruent number.

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, 772072 + ... + 772095.

Almost surely, 2^18530004 is an apocalyptic number.

It is an amenable number.

18530004 is an abundant number, since it is smaller than the sum of its proper divisors (24706700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18530004 is a wasteful number, since it uses less digits than its factorization.

18530004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544174 (or 1544172 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 18530004 is about 4304.6491146201. The cubic root of 18530004 is about 264.6215268869.

Adding to 18530004 its reverse (40003581), we get a palindrome (58533585).

The spelling of 18530004 in words is "eighteen million, five hundred thirty thousand, four".