21023313323320 has 192 divisors, whose sum is σ = 60031610235360. Its totient is φ = 6552283852800.

The previous prime is 21023313323293. The next prime is 21023313323333. The reversal of 21023313323320 is 2332331332012.

It is a super-3 number, since 3×21023313323320³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 504849700 + ... + 504891340.

Almost surely, 2^{21023313323320} is an apocalyptic number.

21023313323320 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 21023313323320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30015805117680).

21023313323320 is an abundant number, since it is smaller than the sum of its proper divisors (39008296912040).

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

21023313323320 is a wasteful number, since it uses less digits than its factorization.

21023313323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65094 (or 65083 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21023313323320 its reverse (2332331332012), we get a palindrome (23355644655332).

The spelling of 21023313323320 in words is "twenty-one trillion, twenty-three billion, three hundred thirteen million, three hundred twenty-three thousand, three hundred twenty".