2031312420 has 72 divisors (see below), whose sum is σ = 6485955840. Its totient is φ = 513172800.

The previous prime is 2031312377. The next prime is 2031312421. The reversal of 2031312420 is 242131302.

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 = 2031312393 and 2031312402.

It is not an unprimeable number, because it can be changed into a prime (2031312421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293556 + ... + 300395.

It is an arithmetic number, because the mean of its divisors is an integer number (90082720).

Almost surely, 2^2031312420 is an apocalyptic number.

2031312420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031312420 is an abundant number, since it is smaller than the sum of its proper divisors (4454643420).

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

2031312420 is a wasteful number, since it uses less digits than its factorization.

2031312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593985 (or 593980 counting only the distinct ones).

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

The square root of 2031312420 is about 45070.0834257049. The cubic root of 2031312420 is about 1266.4622272393.

Adding to 2031312420 its reverse (242131302), we get a palindrome (2273443722).

The spelling of 2031312420 in words is "two billion, thirty-one million, three hundred twelve thousand, four hundred twenty".