21522905848 has 16 divisors (see below), whose sum is σ = 40362032880. Its totient is φ = 10759697088.

The previous prime is 21522905797. The next prime is 21522905857. The reversal of 21522905848 is 84850922512.

It is a super-2 number, since 2×21522905848² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21522905798 and 21522905807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166636 + ... + 266107.

It is an arithmetic number, because the mean of its divisors is an integer number (2522627055).

Almost surely, 2^21522905848 is an apocalyptic number.

It is an amenable number.

21522905848 is a deficient number, since it is larger than the sum of its proper divisors (18839127032).

21522905848 is a wasteful number, since it uses less digits than its factorization.

21522905848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438966 (or 438962 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 21522905848 in words is "twenty-one billion, five hundred twenty-two million, nine hundred five thousand, eight hundred forty-eight".