231013020420 has 144 divisors (see below), whose sum is σ = 862448670720. Its totient is φ = 48741205248.

The previous prime is 231013020397. The next prime is 231013020463. The reversal of 231013020420 is 24020310132.

231013020420 is a `hidden beast` number, since 2 + 310 + 130 + 204 + 20 = 666.

231013020420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 231013020393 and 231013020402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7035300 + ... + 7068059.

It is an arithmetic number, because the mean of its divisors is an integer number (5989226880).

Almost surely, 2^231013020420 is an apocalyptic number.

231013020420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231013020420 is an abundant number, since it is smaller than the sum of its proper divisors (631435650300).

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

231013020420 is a wasteful number, since it uses less digits than its factorization.

231013020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103394 (or 14103389 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231013020420 its reverse (24020310132), we get a palindrome (255033330552).

The spelling of 231013020420 in words is "two hundred thirty-one billion, thirteen million, twenty thousand, four hundred twenty".