31232030020 has 24 divisors (see below), whose sum is σ = 66236646168. Its totient is φ = 12369120000.

The previous prime is 31232029993. The next prime is 31232030021. The reversal of 31232030020 is 2003023213.

It can be written as a sum of positive squares in 4 ways, for example, as 10753275204 + 20478754816 = 103698^2 + 143104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31232029976 and 31232030003.

It is not an unprimeable number, because it can be changed into a prime (31232030021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7728681 + ... + 7732720.

It is an arithmetic number, because the mean of its divisors is an integer number (2759860257).

Almost surely, 2^31232030020 is an apocalyptic number.

It is an amenable number.

31232030020 is an abundant number, since it is smaller than the sum of its proper divisors (35004616148).

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

31232030020 is a wasteful number, since it uses less digits than its factorization.

31232030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15461511 (or 15461509 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31232030020 its reverse (2003023213), we get a palindrome (33235053233).

The spelling of 31232030020 in words is "thirty-one billion, two hundred thirty-two million, thirty thousand, twenty".