21303323021310 has 64 divisors (see below), whose sum is σ = 56328210445824. Its totient is φ = 5113308848000.

The previous prime is 21303323021293. The next prime is 21303323021311. The reversal of 21303323021310 is 1312032330312.

It is a super-2 number, since 2×21303323021310² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303323021311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319548474 + ... + 319615133.

It is an arithmetic number, because the mean of its divisors is an integer number (880128288216).

Almost surely, 2^{21303323021310} is an apocalyptic number.

21303323021310 is an abundant number, since it is smaller than the sum of its proper divisors (35024887424514).

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

21303323021310 is a wasteful number, since it uses less digits than its factorization.

21303323021310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639163729.

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

Adding to 21303323021310 its reverse (1312032330312), we get a palindrome (22615355351622).

The spelling of 21303323021310 in words is "twenty-one trillion, three hundred three billion, three hundred twenty-three million, twenty-one thousand, three hundred ten".