20884568124 has 144 divisors (see below), whose sum is σ = 60562965120. Its totient is φ = 5568393600.

The previous prime is 20884568083. The next prime is 20884568179. The reversal of 20884568124 is 42186548802.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 734574 + ... + 762474.

Almost surely, 2^20884568124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20884568124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30281482560).

20884568124 is an abundant number, since it is smaller than the sum of its proper divisors (39678396996).

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

20884568124 is a wasteful number, since it uses less digits than its factorization.

20884568124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28008 (or 27999 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 48.

The spelling of 20884568124 in words is "twenty billion, eight hundred eighty-four million, five hundred sixty-eight thousand, one hundred twenty-four".