20808522756 has 48 divisors (see below), whose sum is σ = 61654884480. Its totient is φ = 5945292000.

The previous prime is 20808522667. The next prime is 20808522773. The reversal of 20808522756 is 65722580802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13761495 + ... + 13763006.

It is an arithmetic number, because the mean of its divisors is an integer number (1284476760).

Almost surely, 2^20808522756 is an apocalyptic number.

It is an amenable number.

20808522756 is an abundant number, since it is smaller than the sum of its proper divisors (40846361724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20808522756 is a wasteful number, since it uses less digits than its factorization.

20808522756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27524521 (or 27524513 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 20808522756 in words is "twenty billion, eight hundred eight million, five hundred twenty-two thousand, seven hundred fifty-six".