18210004 has 12 divisors (see below), whose sum is σ = 32196724. Its totient is φ = 9010944.

The previous prime is 18209987. The next prime is 18210011. The reversal of 18210004 is 40001281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3617604 + 14592400 = 1902^2 + 3820^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18210004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23079 + ... + 23854.

Almost surely, 2^18210004 is an apocalyptic number.

It is an amenable number.

18210004 is a deficient number, since it is larger than the sum of its proper divisors (13986720).

18210004 is a wasteful number, since it uses less digits than its factorization.

18210004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47034 (or 47032 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18210004 is about 4267.3181273488. The cubic root of 18210004 is about 263.0893979172.

Adding to 18210004 its reverse (40001281), we get a palindrome (58211285).

The spelling of 18210004 in words is "eighteen million, two hundred ten thousand, four".