21805914096 has 120 divisors (see below), whose sum is σ = 64154279280. Its totient is φ = 7168974336.

The previous prime is 21805914049. The next prime is 21805914101. The reversal of 21805914096 is 69041950812.

21805914096 is a `hidden beast` number, since 2 + 18 + 0 + 591 + 40 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245410 + ... + 322238.

It is an arithmetic number, because the mean of its divisors is an integer number (534618994).

Almost surely, 2^21805914096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21805914096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32077139640).

21805914096 is an abundant number, since it is smaller than the sum of its proper divisors (42348365184).

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

21805914096 is an equidigital number, since it uses as much as digits as its factorization.

21805914096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76925 (or 76907 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 21805914096 in words is "twenty-one billion, eight hundred five million, nine hundred fourteen thousand, ninety-six".