20880889920 has 336 divisors, whose sum is σ = 78543960768. Its totient is φ = 5049569280.

The previous prime is 20880889907. The next prime is 20880889927. The reversal of 20880889920 is 2998808802.

It is not an unprimeable number, because it can be changed into a prime (20880889927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25248547 + ... + 25249373.

It is an arithmetic number, because the mean of its divisors is an integer number (233761788).

Almost surely, 2^20880889920 is an apocalyptic number.

20880889920 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 20880889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39271980384).

20880889920 is an abundant number, since it is smaller than the sum of its proper divisors (57663070848).

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

20880889920 is a wasteful number, since it uses less digits than its factorization.

20880889920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 20880889920 in words is "twenty billion, eight hundred eighty million, eight hundred eighty-nine thousand, nine hundred twenty".