20665760480205 has 16 divisors (see below), whose sum is σ = 33834175298880. Its totient is φ = 10765419412608.

The previous prime is 20665760480149. The next prime is 20665760480219. The reversal of 20665760480205 is 50208406756602.

It is not a de Polignac number, because 20665760480205 - 2¹⁰ = 20665760479181 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, 16019968720 + ... + 16019970009.

It is an arithmetic number, because the mean of its divisors is an integer number (2114635956180).

Almost surely, 2^{20665760480205} is an apocalyptic number.

It is an amenable number.

20665760480205 is a deficient number, since it is larger than the sum of its proper divisors (13168414818675).

20665760480205 is a wasteful number, since it uses less digits than its factorization.

20665760480205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32039938780.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 20665760480205 in words is "twenty trillion, six hundred sixty-five billion, seven hundred sixty million, four hundred eighty thousand, two hundred five".