20031131213230 has 32 divisors (see below), whose sum is σ = 36245919191040. Its totient is φ = 7970258827680.

The previous prime is 20031131213213. The next prime is 20031131213231. The reversal of 20031131213230 is 3231213113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031131213231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70488087 + ... + 70771693.

It is an arithmetic number, because the mean of its divisors is an integer number (1132684974720).

Almost surely, 2^{20031131213230} is an apocalyptic number.

20031131213230 is a deficient number, since it is larger than the sum of its proper divisors (16214787977810).

20031131213230 is a wasteful number, since it uses less digits than its factorization.

20031131213230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320784.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20031131213230 its reverse (3231213113002), we get a palindrome (23262344326232).

The spelling of 20031131213230 in words is "twenty trillion, thirty-one billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred thirty".