21331302232020 has 96 divisors (see below), whose sum is σ = 65161186836480. Its totient is φ = 5170926802560.

The previous prime is 21331302231937. The next prime is 21331302232061. The reversal of 21331302232020 is 2023220313312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10640109 + ... + 12484971.

It is an arithmetic number, because the mean of its divisors is an integer number (678762362880).

Almost surely, 2^{21331302232020} is an apocalyptic number.

21331302232020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331302232020 is an abundant number, since it is smaller than the sum of its proper divisors (43829884604460).

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

21331302232020 is a wasteful number, since it uses less digits than its factorization.

21331302232020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862405 (or 1862403 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21331302232020 its reverse (2023220313312), we get a palindrome (23354522545332).

The spelling of 21331302232020 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred two million, two hundred thirty-two thousand, twenty".