21323311300320 has 192 divisors, whose sum is σ = 67529898241344. Its totient is φ = 5655627694080.

The previous prime is 21323311300111. The next prime is 21323311300351. The reversal of 21323311300320 is 2300311332312.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 531826194 + ... + 531866286.

It is an arithmetic number, because the mean of its divisors is an integer number (351718220007).

Almost surely, 2^{21323311300320} is an apocalyptic number.

21323311300320 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 21323311300320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33764949120672).

21323311300320 is an abundant number, since it is smaller than the sum of its proper divisors (46206586941024).

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

21323311300320 is a wasteful number, since it uses less digits than its factorization.

21323311300320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46045 (or 46037 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21323311300320 its reverse (2300311332312), we get a palindrome (23623622632632).

The spelling of 21323311300320 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred eleven million, three hundred thousand, three hundred twenty".