20650955893 has 2 divisors, whose sum is σ = 20650955894. Its totient is φ = 20650955892.

The previous prime is 20650955879. The next prime is 20650955917. The reversal of 20650955893 is 39855905602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19987738884 + 663217009 = 141378^2 + 25753^2 .

It is a cyclic number.

It is not a de Polignac number, because 20650955893 - 2⁵ = 20650955861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20650955893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20650955863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325477946 + 10325477947.

It is an arithmetic number, because the mean of its divisors is an integer number (10325477947).

Almost surely, 2^20650955893 is an apocalyptic number.

It is an amenable number.

20650955893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650955893 is an equidigital number, since it uses as much as digits as its factorization.

20650955893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 20650955893 in words is "twenty billion, six hundred fifty million, nine hundred fifty-five thousand, eight hundred ninety-three".