20201321310 has 128 divisors (see below), whose sum is σ = 50231301120. Its totient is φ = 5196441600.

The previous prime is 20201321293. The next prime is 20201321311. The reversal of 20201321310 is 1312310202.

It is a super-2 number, since 2×20201321310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20201321310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201321311) 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 63 ways as a sum of consecutive naturals, for example, 56270911 + ... + 56271269.

It is an arithmetic number, because the mean of its divisors is an integer number (392432040).

Almost surely, 2^20201321310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201321310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25115650560).

20201321310 is an abundant number, since it is smaller than the sum of its proper divisors (30029979810).

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

20201321310 is a wasteful number, since it uses less digits than its factorization.

20201321310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20201321310 its reverse (1312310202), we get a palindrome (21513631512).

The spelling of 20201321310 in words is "twenty billion, two hundred one million, three hundred twenty-one thousand, three hundred ten".