21320330133020 has 96 divisors (see below), whose sum is σ = 47485776744000. Its totient is φ = 8018239334400.

The previous prime is 21320330132993. The next prime is 21320330133199. The reversal of 21320330133020 is 2033103302312.

It is a super-2 number, since 2×21320330133020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66708800 + ... + 67027640.

It is an arithmetic number, because the mean of its divisors is an integer number (494643507750).

Almost surely, 2^{21320330133020} is an apocalyptic number.

21320330133020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21320330133020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23742888372000).

21320330133020 is an abundant number, since it is smaller than the sum of its proper divisors (26165446610980).

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

21320330133020 is a wasteful number, since it uses less digits than its factorization.

21320330133020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320199 (or 320197 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21320330133020 its reverse (2033103302312), we get a palindrome (23353433435332).

The spelling of 21320330133020 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty million, one hundred thirty-three thousand, twenty".