18210005 has 16 divisors (see below), whose sum is σ = 24292224. Its totient is φ = 12991680.

The previous prime is 18209987. The next prime is 18210011. The reversal of 18210005 is 50001281.

It is not a de Polignac number, because 18210005 - 2¹² = 18205909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209 + ... + 6038.

It is an arithmetic number, because the mean of its divisors is an integer number (1518264).

Almost surely, 2^18210005 is an apocalyptic number.

It is an amenable number.

18210005 is a deficient number, since it is larger than the sum of its proper divisors (6082219).

18210005 is a wasteful number, since it uses less digits than its factorization.

18210005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 18210005 is about 4267.3182445184. The cubic root of 18210005 is about 263.0894027331.

Adding to 18210005 its reverse (50001281), we get a palindrome (68211286).

The spelling of 18210005 in words is "eighteen million, two hundred ten thousand, five".