20626043928605 has 54 divisors (see below), whose sum is σ = 26054452269594. Its totient is φ = 15674201440128.

The previous prime is 20626043928593. The next prime is 20626043928629. The reversal of 20626043928605 is 50682934062602.

It can be written as a sum of positive squares in 3 ways, for example, as 303944356 + 20625739984249 = 17434^2 + 4541557^2 .

It is not a de Polignac number, because 20626043928605 - 2²⁰ = 20626042880029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 54422279306 + ... + 54422279684.

Almost surely, 2^{20626043928605} is an apocalyptic number.

It is an amenable number.

20626043928605 is a deficient number, since it is larger than the sum of its proper divisors (5428408340989).

20626043928605 is an frugal number, since it uses more digits than its factorization.

20626043928605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 20626043928605 in words is "twenty trillion, six hundred twenty-six billion, forty-three million, nine hundred twenty-eight thousand, six hundred five".