210020321320 has 64 divisors (see below), whose sum is σ = 479258208000. Its totient is φ = 82818048768.

The previous prime is 210020321309. The next prime is 210020321347. The reversal of 210020321320 is 23123020012.

It is a junction number, because it is equal to n+sod(n) for n = 210020321294 and 210020321303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2032014 + ... + 2132866.

It is an arithmetic number, because the mean of its divisors is an integer number (7488409500).

Almost surely, 2^210020321320 is an apocalyptic number.

210020321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210020321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239629104000).

210020321320 is an abundant number, since it is smaller than the sum of its proper divisors (269237886680).

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

210020321320 is a wasteful number, since it uses less digits than its factorization.

210020321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101602 (or 101598 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 210020321320 its reverse (23123020012), we get a palindrome (233143341332).

The spelling of 210020321320 in words is "two hundred ten billion, twenty million, three hundred twenty-one thousand, three hundred twenty".