231312310020 has 144 divisors (see below), whose sum is σ = 790125073920. Its totient is φ = 54266803200.

The previous prime is 231312310003. The next prime is 231312310067. The reversal of 231312310020 is 20013213132.

231312310020 is a `hidden beast` number, since 23 + 1 + 312 + 310 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231312309975 and 231312310002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1822885 + ... + 1945644.

It is an arithmetic number, because the mean of its divisors is an integer number (5486979680).

Almost surely, 2^231312310020 is an apocalyptic number.

231312310020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312310020 is an abundant number, since it is smaller than the sum of its proper divisors (558812763900).

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

231312310020 is a wasteful number, since it uses less digits than its factorization.

231312310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768586 (or 3768581 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231312310020 its reverse (20013213132), we get a palindrome (251325523152).

The spelling of 231312310020 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred ten thousand, twenty".