18210532165 has 64 divisors (see below), whose sum is σ = 26812800000. Its totient is φ = 11607515136.

The previous prime is 18210532163. The next prime is 18210532229. The reversal of 18210532165 is 56123501281.

It is not a de Polignac number, because 18210532165 - 2¹ = 18210532163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18210532165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18210532163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3640336 + ... + 3645334.

It is an arithmetic number, because the mean of its divisors is an integer number (418950000).

Almost surely, 2^18210532165 is an apocalyptic number.

It is an amenable number.

18210532165 is a deficient number, since it is larger than the sum of its proper divisors (8602267835).

18210532165 is a wasteful number, since it uses less digits than its factorization.

18210532165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 18210532165 in words is "eighteen billion, two hundred ten million, five hundred thirty-two thousand, one hundred sixty-five".