2031304340 has 96 divisors (see below), whose sum is σ = 4832061696. Its totient is φ = 711659520.

The previous prime is 2031304309. The next prime is 2031304399. The reversal of 2031304340 is 434031302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 782084 + ... + 784676.

It is an arithmetic number, because the mean of its divisors is an integer number (50333976).

Almost surely, 2^2031304340 is an apocalyptic number.

2031304340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031304340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416030848).

2031304340 is an abundant number, since it is smaller than the sum of its proper divisors (2800757356).

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

2031304340 is a wasteful number, since it uses less digits than its factorization.

2031304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769 (or 2767 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 2031304340 is about 45069.9937874413. The cubic root of 2031304340 is about 1266.4605480247.

Adding to 2031304340 its reverse (434031302), we get a palindrome (2465335642).

The spelling of 2031304340 in words is "two billion, thirty-one million, three hundred four thousand, three hundred forty".