21855375286 has 12 divisors (see below), whose sum is σ = 33874697556. Its totient is φ = 10575180660.

The previous prime is 21855375239. The next prime is 21855375293. The reversal of 21855375286 is 68257355812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5683660 + ... + 5687503.

It is an arithmetic number, because the mean of its divisors is an integer number (2822891463).

Almost surely, 2^21855375286 is an apocalyptic number.

21855375286 is a deficient number, since it is larger than the sum of its proper divisors (12019322270).

21855375286 is a wasteful number, since it uses less digits than its factorization.

21855375286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11371227 (or 11371196 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 52.

The spelling of 21855375286 in words is "twenty-one billion, eight hundred fifty-five million, three hundred seventy-five thousand, two hundred eighty-six".