21320331310 has 32 divisors (see below), whose sum is σ = 38816043840. Its totient is φ = 8430676992.

The previous prime is 21320331301. The next prime is 21320331317. The reversal of 21320331310 is 1313302312.

It is a super-3 number, since 3×21320331310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320331317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879472 + ... + 903388.

It is an arithmetic number, because the mean of its divisors is an integer number (1213001370).

Almost surely, 2^21320331310 is an apocalyptic number.

21320331310 is a deficient number, since it is larger than the sum of its proper divisors (17495712530).

21320331310 is a wasteful number, since it uses less digits than its factorization.

21320331310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24940.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21320331310 its reverse (1313302312), we get a palindrome (22633633622).

The spelling of 21320331310 in words is "twenty-one billion, three hundred twenty million, three hundred thirty-one thousand, three hundred ten".