20620205055165 has 32 divisors (see below), whose sum is σ = 33551976528000. Its totient is φ = 10810898288640.

The previous prime is 20620205055113. The next prime is 20620205055169. The reversal of 20620205055165 is 56155050202602.

It is not a de Polignac number, because 20620205055165 - 2⁶ = 20620205055101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620205055169) 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, 102425805 + ... + 102626925.

It is an arithmetic number, because the mean of its divisors is an integer number (1048499266500).

Almost surely, 2^{20620205055165} is an apocalyptic number.

It is an amenable number.

20620205055165 is a deficient number, since it is larger than the sum of its proper divisors (12931771472835).

20620205055165 is a wasteful number, since it uses less digits than its factorization.

20620205055165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317037.

The product of its (nonzero) digits is 180000, while the sum is 39.

Adding to 20620205055165 its reverse (56155050202602), we get a palindrome (76775255257767).

The spelling of 20620205055165 in words is "twenty trillion, six hundred twenty billion, two hundred five million, fifty-five thousand, one hundred sixty-five".