21927310848 has 320 divisors, whose sum is σ = 70552627200. Its totient is φ = 6698557440.

The previous prime is 21927310789. The next prime is 21927310861. The reversal of 21927310848 is 84801372912.

It is a happy number.

It is a super-2 number, since 2×21927310848² (a number of 21 digits) contains 22 as substring.

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, 8140990 + ... + 8143682.

It is an arithmetic number, because the mean of its divisors is an integer number (220476960).

Almost surely, 2^21927310848 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 21927310848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35276313600).

21927310848 is an abundant number, since it is smaller than the sum of its proper divisors (48625316352).

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

21927310848 is a wasteful number, since it uses less digits than its factorization.

21927310848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 21927310848 in words is "twenty-one billion, nine hundred twenty-seven million, three hundred ten thousand, eight hundred forty-eight".