20320203320 has 32 divisors (see below), whose sum is σ = 45734371200. Its totient is φ = 8125607808.

The previous prime is 20320203301. The next prime is 20320203359. The reversal of 20320203320 is 2330202302.

It is a super-2 number, since 2×20320203320² (a number of 21 digits) contains 22 as substring.

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, 58742 + ... + 209978.

It is an arithmetic number, because the mean of its divisors is an integer number (1429199100).

Almost surely, 2^20320203320 is an apocalyptic number.

20320203320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320203320 is an abundant number, since it is smaller than the sum of its proper divisors (25414167880).

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

20320203320 is a wasteful number, since it uses less digits than its factorization.

20320203320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154607 (or 154603 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

Adding to 20320203320 its reverse (2330202302), we get a palindrome (22650405622).

The spelling of 20320203320 in words is "twenty billion, three hundred twenty million, two hundred three thousand, three hundred twenty".