21320311310 has 16 divisors (see below), whose sum is σ = 39413765376. Its totient is φ = 8297634528.

The previous prime is 21320311297. The next prime is 21320311319. The reversal of 21320311310 is 1311302312.

It is a super-2 number, since 2×21320311310² (a number of 21 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 (21320311319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28810862 + ... + 28811601.

It is an arithmetic number, because the mean of its divisors is an integer number (2463360336).

Almost surely, 2^21320311310 is an apocalyptic number.

21320311310 is a deficient number, since it is larger than the sum of its proper divisors (18093454066).

21320311310 is a wasteful number, since it uses less digits than its factorization.

21320311310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57622507.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21320311310 its reverse (1311302312), we get a palindrome (22631613622).

The spelling of 21320311310 in words is "twenty-one billion, three hundred twenty million, three hundred eleven thousand, three hundred ten".