20408804211 has 24 divisors (see below), whose sum is σ = 27996373440. Its totient is φ = 13224277152.

The previous prime is 20408804197. The next prime is 20408804263. The reversal of 20408804211 is 11240880402.

It is not a de Polignac number, because 20408804211 - 2⁷ = 20408804083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20408804411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5168740 + ... + 5172686.

It is an arithmetic number, because the mean of its divisors is an integer number (1166515560).

Almost surely, 2^20408804211 is an apocalyptic number.

20408804211 is a deficient number, since it is larger than the sum of its proper divisors (7587569229).

20408804211 is a wasteful number, since it uses less digits than its factorization.

20408804211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283 (or 5246 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The spelling of 20408804211 in words is "twenty billion, four hundred eight million, eight hundred four thousand, two hundred eleven".