20650955899 has 16 divisors (see below), whose sum is σ = 23949365440. Its totient is φ = 17441412480.

The previous prime is 20650955893. The next prime is 20650955917. The reversal of 20650955899 is 99855905602.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20650955899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20650955893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63337 + ... + 212869.

It is an arithmetic number, because the mean of its divisors is an integer number (1496835340).

Almost surely, 2^20650955899 is an apocalyptic number.

20650955899 is a deficient number, since it is larger than the sum of its proper divisors (3298409541).

20650955899 is a wasteful number, since it uses less digits than its factorization.

20650955899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149830.

The product of its (nonzero) digits is 8748000, while the sum is 58.

The spelling of 20650955899 in words is "twenty billion, six hundred fifty million, nine hundred fifty-five thousand, eight hundred ninety-nine".