20868964099 has 2 divisors, whose sum is σ = 20868964100. Its totient is φ = 20868964098.

The previous prime is 20868964019. The next prime is 20868964117. The reversal of 20868964099 is 99046986802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20868964099 - 2²¹ = 20866866947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20868964019) 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 as a sum of consecutive naturals, namely, 10434482049 + 10434482050.

It is an arithmetic number, because the mean of its divisors is an integer number (10434482050).

Almost surely, 2^20868964099 is an apocalyptic number.

20868964099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20868964099 is an equidigital number, since it uses as much as digits as its factorization.

20868964099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 20868964099 in words is "twenty billion, eight hundred sixty-eight million, nine hundred sixty-four thousand, ninety-nine".