20648722086 has 48 divisors (see below), whose sum is σ = 44903710800. Its totient is φ = 6857604864.

The previous prime is 20648722033. The next prime is 20648722099. The reversal of 20648722086 is 68022784602.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6338170 + ... + 6341426.

It is an arithmetic number, because the mean of its divisors is an integer number (935493975).

Almost surely, 2^20648722086 is an apocalyptic number.

20648722086 is an abundant number, since it is smaller than the sum of its proper divisors (24254988714).

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

20648722086 is a wasteful number, since it uses less digits than its factorization.

20648722086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 20648722086 in words is "twenty billion, six hundred forty-eight million, seven hundred twenty-two thousand, eighty-six".