20839441984 has 112 divisors (see below), whose sum is σ = 45555489280. Its totient is φ = 9420779520.

The previous prime is 20839441981. The next prime is 20839441991. The reversal of 20839441984 is 48914493802.

It is not an unprimeable number, because it can be changed into a prime (20839441981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2748022 + ... + 2755594.

It is an arithmetic number, because the mean of its divisors is an integer number (406745440).

Almost surely, 2^20839441984 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 20839441984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22777744640).

20839441984 is an abundant number, since it is smaller than the sum of its proper divisors (24716047296).

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

20839441984 is a wasteful number, since it uses less digits than its factorization.

20839441984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708 (or 7698 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 20839441984 in words is "twenty billion, eight hundred thirty-nine million, four hundred forty-one thousand, nine hundred eighty-four".