21323110023320 has 384 divisors, whose sum is σ = 57213627609600. Its totient is φ = 7129475426304.

The previous prime is 21323110023287. The next prime is 21323110023323. The reversal of 21323110023320 is 2332001132312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323110023323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14000728079 + ... + 14000729601.

It is an arithmetic number, because the mean of its divisors is an integer number (148993821900).

Almost surely, 2^{21323110023320} is an apocalyptic number.

21323110023320 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 21323110023320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28606813804800).

21323110023320 is an abundant number, since it is smaller than the sum of its proper divisors (35890517586280).

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

21323110023320 is a wasteful number, since it uses less digits than its factorization.

21323110023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21323110023320 its reverse (2332001132312), we get a palindrome (23655111155632).

The spelling of 21323110023320 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred ten million, twenty-three thousand, three hundred twenty".