20320321210 has 32 divisors (see below), whose sum is σ = 44001901440. Its totient is φ = 6600284352.

The previous prime is 20320321181. The next prime is 20320321213. The reversal of 20320321210 is 1212302302.

It is not an unprimeable number, because it can be changed into a prime (20320321213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7637889 + ... + 7640548.

It is an arithmetic number, because the mean of its divisors is an integer number (1375059420).

Almost surely, 2^20320321210 is an apocalyptic number.

20320321210 is an abundant number, since it is smaller than the sum of its proper divisors (23681580230).

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

20320321210 is a wasteful number, since it uses less digits than its factorization.

20320321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278470.

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

Adding to 20320321210 its reverse (1212302302), we get a palindrome (21532623512).

The spelling of 20320321210 in words is "twenty billion, three hundred twenty million, three hundred twenty-one thousand, two hundred ten".