20832821920 has 96 divisors (see below), whose sum is σ = 50009400000. Its totient is φ = 8200052736.

The previous prime is 20832821879. The next prime is 20832821927. The reversal of 20832821920 is 2912823802.

It is a self number, because there is not a number n which added to its sum of digits gives 20832821920.

It is not an unprimeable number, because it can be changed into a prime (20832821927) 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 15 ways as a sum of consecutive naturals, for example, 2774331 + ... + 2781829.

It is an arithmetic number, because the mean of its divisors is an integer number (520931250).

Almost surely, 2^20832821920 is an apocalyptic number.

20832821920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20832821920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25004700000).

20832821920 is an abundant number, since it is smaller than the sum of its proper divisors (29176578080).

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

20832821920 is a wasteful number, since it uses less digits than its factorization.

20832821920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790 (or 7782 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 20832821920 in words is "twenty billion, eight hundred thirty-two million, eight hundred twenty-one thousand, nine hundred twenty".