18105065990005 has 32 divisors (see below), whose sum is σ = 23798608185600. Its totient is φ = 13161271022592.

The previous prime is 18105065990003. The next prime is 18105065990161. The reversal of 18105065990005 is 50009956050181.

It is a cyclic number.

It is not a de Polignac number, because 18105065990005 - 2¹ = 18105065990003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18105065990003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48025174 + ... + 48400696.

It is an arithmetic number, because the mean of its divisors is an integer number (743706505800).

Almost surely, 2^{18105065990005} is an apocalyptic number.

It is an amenable number.

18105065990005 is a deficient number, since it is larger than the sum of its proper divisors (5693542195595).

18105065990005 is a wasteful number, since it uses less digits than its factorization.

18105065990005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395133.

The product of its (nonzero) digits is 486000, while the sum is 49.

The spelling of 18105065990005 in words is "eighteen trillion, one hundred five billion, sixty-five million, nine hundred ninety thousand, five".