21283812882 has 120 divisors (see below), whose sum is σ = 51605270640. Its totient is φ = 6538255200.

The previous prime is 21283812877. The next prime is 21283812929. The reversal of 21283812882 is 28821838212.

21283812882 is a `hidden beast` number, since 212 + 83 + 81 + 288 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4211257 + ... + 4216307.

It is an arithmetic number, because the mean of its divisors is an integer number (430043922).

Almost surely, 2^21283812882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21283812882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25802635320).

21283812882 is an abundant number, since it is smaller than the sum of its proper divisors (30321457758).

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

21283812882 is a wasteful number, since it uses less digits than its factorization.

21283812882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5112 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The spelling of 21283812882 in words is "twenty-one billion, two hundred eighty-three million, eight hundred twelve thousand, eight hundred eighty-two".