20312100320 has 48 divisors (see below), whose sum is σ = 48663242208. Its totient is φ = 8010401280.

The previous prime is 20312100307. The next prime is 20312100379. The reversal of 20312100320 is 2300121302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20312100295 and 20312100304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882659 + ... + 905378.

It is an arithmetic number, because the mean of its divisors is an integer number (1013817546).

Almost surely, 2^20312100320 is an apocalyptic number.

20312100320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312100320 is an abundant number, since it is smaller than the sum of its proper divisors (28351141888).

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

20312100320 is a wasteful number, since it uses less digits than its factorization.

20312100320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788123 (or 1788115 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20312100320 its reverse (2300121302), we get a palindrome (22612221622).

The spelling of 20312100320 in words is "twenty billion, three hundred twelve million, one hundred thousand, three hundred twenty".