20889796680 has 192 divisors, whose sum is σ = 68749200000. Its totient is φ = 5500597248.

The previous prime is 20889796661. The next prime is 20889796691. The reversal of 20889796680 is 8669798802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18502356 + ... + 18503484.

It is an arithmetic number, because the mean of its divisors is an integer number (358068750).

Almost surely, 2^20889796680 is an apocalyptic number.

20889796680 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 20889796680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34374600000).

20889796680 is an abundant number, since it is smaller than the sum of its proper divisors (47859403320).

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

20889796680 is a wasteful number, since it uses less digits than its factorization.

20889796680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 1741 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 20889796680 in words is "twenty billion, eight hundred eighty-nine million, seven hundred ninety-six thousand, six hundred eighty".