20648884650 has 24 divisors (see below), whose sum is σ = 51209234304. Its totient is φ = 5506369200.

The previous prime is 20648884577. The next prime is 20648884651. The reversal of 20648884650 is 5648884602.

It is a junction number, because it is equal to n+sod(n) for n = 20648884593 and 20648884602.

It is not an unprimeable number, because it can be changed into a prime (20648884651) 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 in 11 ways as a sum of consecutive naturals, for example, 68829466 + ... + 68829765.

It is an arithmetic number, because the mean of its divisors is an integer number (2133718096).

Almost surely, 2^20648884650 is an apocalyptic number.

20648884650 is an abundant number, since it is smaller than the sum of its proper divisors (30560349654).

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

20648884650 is a wasteful number, since it uses less digits than its factorization.

20648884650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137659246 (or 137659241 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 51.

The spelling of 20648884650 in words is "twenty billion, six hundred forty-eight million, eight hundred eighty-four thousand, six hundred fifty".