20320321310 has 16 divisors (see below), whose sum is σ = 36864585216. Its totient is φ = 8064127008.

The previous prime is 20320321309. The next prime is 20320321331. The reversal of 20320321310 is 1312302302.

It is a super-2 number, since 2×20320321310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7998857 + ... + 8001396.

It is an arithmetic number, because the mean of its divisors is an integer number (2304036576).

Almost surely, 2^20320321310 is an apocalyptic number.

20320321310 is a deficient number, since it is larger than the sum of its proper divisors (16544263906).

20320321310 is a wasteful number, since it uses less digits than its factorization.

20320321310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16000387.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20320321310 its reverse (1312302302), we get a palindrome (21632623612).

The spelling of 20320321310 in words is "twenty billion, three hundred twenty million, three hundred twenty-one thousand, three hundred ten".