18730004 has 24 divisors (see below), whose sum is σ = 34440000. Its totient is φ = 8895744.

The previous prime is 18730001. The next prime is 18730009. The reversal of 18730004 is 40003781.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14372 + ... + 15620.

It is an arithmetic number, because the mean of its divisors is an integer number (1435000).

Almost surely, 2^18730004 is an apocalyptic number.

It is an amenable number.

18730004 is a deficient number, since it is larger than the sum of its proper divisors (15709996).

18730004 is a wasteful number, since it uses less digits than its factorization.

18730004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 18730004 is about 4327.8174638032. The cubic root of 18730004 is about 265.5701690561.

Adding to 18730004 its reverse (40003781), we get a palindrome (58733785).

The spelling of 18730004 in words is "eighteen million, seven hundred thirty thousand, four".