21302321022 has 48 divisors (see below), whose sum is σ = 47574002112. Its totient is φ = 6883859520.

The previous prime is 21302321009. The next prime is 21302321039. The reversal of 21302321022 is 22012320312.

21302321022 is a `hidden beast` number, since 21 + 302 + 321 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21302320986 and 21302321004.

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, 126747 + ... + 242217.

It is an arithmetic number, because the mean of its divisors is an integer number (991125044).

Almost surely, 2^21302321022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21302321022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23787001056).

21302321022 is an abundant number, since it is smaller than the sum of its proper divisors (26271681090).

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

21302321022 is a wasteful number, since it uses less digits than its factorization.

21302321022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115793 (or 115790 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21302321022 its reverse (22012320312), we get a palindrome (43314641334).

The spelling of 21302321022 in words is "twenty-one billion, three hundred two million, three hundred twenty-one thousand, twenty-two".