21853448880 has 160 divisors (see below), whose sum is σ = 71979321600. Its totient is φ = 5469152256.

The previous prime is 21853448879. The next prime is 21853448989. The reversal of 21853448880 is 8884435812.

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, 465526 + ... + 510314.

It is an arithmetic number, because the mean of its divisors is an integer number (449870760).

Almost surely, 2^21853448880 is an apocalyptic number.

21853448880 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 21853448880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35989660800).

21853448880 is an abundant number, since it is smaller than the sum of its proper divisors (50125872720).

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

21853448880 is a wasteful number, since it uses less digits than its factorization.

21853448880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44931 (or 44925 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 51.

The spelling of 21853448880 in words is "twenty-one billion, eight hundred fifty-three million, four hundred forty-eight thousand, eight hundred eighty".