20031131233230 has 64 divisors (see below), whose sum is σ = 51773634114048. Its totient is φ = 4930657695360.

The previous prime is 20031131233219. The next prime is 20031131233247. The reversal of 20031131233230 is 3233213113002.

It is a self number, because there is not a number n which added to its sum of digits gives 20031131233230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24880047 + ... + 25672533.

It is an arithmetic number, because the mean of its divisors is an integer number (808963033032).

Almost surely, 2^{20031131233230} is an apocalyptic number.

20031131233230 is an abundant number, since it is smaller than the sum of its proper divisors (31742502880818).

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

20031131233230 is a wasteful number, since it uses less digits than its factorization.

20031131233230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857321.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 20031131233230 its reverse (3233213113002), we get a palindrome (23264344346232).

The spelling of 20031131233230 in words is "twenty trillion, thirty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred thirty".