20808088211 has 2 divisors, whose sum is σ = 20808088212. Its totient is φ = 20808088210.

The previous prime is 20808088177. The next prime is 20808088271. The reversal of 20808088211 is 11288080802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20808088211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20808088271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10404044105 + 10404044106.

It is an arithmetic number, because the mean of its divisors is an integer number (10404044106).

Almost surely, 2^20808088211 is an apocalyptic number.

20808088211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20808088211 is an equidigital number, since it uses as much as digits as its factorization.

20808088211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16384, while the sum is 38.

The spelling of 20808088211 in words is "twenty billion, eight hundred eight million, eighty-eight thousand, two hundred eleven".