21703126880 has 96 divisors (see below), whose sum is σ = 52309097568. Its totient is φ = 8506368000.

The previous prime is 21703126871. The next prime is 21703126909. The reversal of 21703126880 is 8862130712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10183415 + ... + 10185545.

It is an arithmetic number, because the mean of its divisors is an integer number (544886433).

Almost surely, 2^21703126880 is an apocalyptic number.

21703126880 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 21703126880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26154548784).

21703126880 is an abundant number, since it is smaller than the sum of its proper divisors (30605970688).

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

21703126880 is a wasteful number, since it uses less digits than its factorization.

21703126880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 21703126880 in words is "twenty-one billion, seven hundred three million, one hundred twenty-six thousand, eight hundred eighty".