20889722880 has 448 divisors, whose sum is σ = 80038163520. Its totient is φ = 5138546688.

The previous prime is 20889722863. The next prime is 20889722891. The reversal of 20889722880 is 8822798802.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14376234 + ... + 14377686.

It is an arithmetic number, because the mean of its divisors is an integer number (178656615).

Almost surely, 2^20889722880 is an apocalyptic number.

20889722880 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 20889722880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40019081760).

20889722880 is an abundant number, since it is smaller than the sum of its proper divisors (59148440640).

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

20889722880 is a wasteful number, since it uses less digits than its factorization.

20889722880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 20889722880 in words is "twenty billion, eight hundred eighty-nine million, seven hundred twenty-two thousand, eight hundred eighty".