20031232220320 has 96 divisors (see below), whose sum is σ = 48931092173376. Its totient is φ = 7744009267200.

The previous prime is 20031232220303. The next prime is 20031232220347. The reversal of 20031232220320 is 2302223213002.

It is a super-2 number, since 2×20031232220320² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20031232220291 and 20031232220300.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13566966 + ... + 14970805.

It is an arithmetic number, because the mean of its divisors is an integer number (509698876806).

Almost surely, 2^{20031232220320} is an apocalyptic number.

20031232220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031232220320 is an abundant number, since it is smaller than the sum of its proper divisors (28899859953056).

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

20031232220320 is a wasteful number, since it uses less digits than its factorization.

20031232220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28537934 (or 28537926 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20031232220320 its reverse (2302223213002), we get a palindrome (22333455433322).

The spelling of 20031232220320 in words is "twenty trillion, thirty-one billion, two hundred thirty-two million, two hundred twenty thousand, three hundred twenty".