20656505050 has 24 divisors (see below), whose sum is σ = 38697523200. Its totient is φ = 8203156080.

The previous prime is 20656505041. The next prime is 20656505053. The reversal of 20656505050 is 5050565602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20656504997 and 20656505015.

It is not an unprimeable number, because it can be changed into a prime (20656505053) 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 11 ways as a sum of consecutive naturals, for example, 1479130 + ... + 1493029.

It is an arithmetic number, because the mean of its divisors is an integer number (1612396800).

Almost surely, 2^20656505050 is an apocalyptic number.

20656505050 is a deficient number, since it is larger than the sum of its proper divisors (18041018150).

20656505050 is a wasteful number, since it uses less digits than its factorization.

20656505050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972310 (or 2972305 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 20656505050 in words is "twenty billion, six hundred fifty-six million, five hundred five thousand, fifty".