2031113394 has 80 divisors (see below), whose sum is σ = 4764070080. Its totient is φ = 645559200.

The previous prime is 2031113393. The next prime is 2031113407. The reversal of 2031113394 is 4933111302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2031113393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1560544 + ... + 1561844.

It is an arithmetic number, because the mean of its divisors is an integer number (59550876).

Almost surely, 2^2031113394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031113394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382035040).

2031113394 is an abundant number, since it is smaller than the sum of its proper divisors (2732956686).

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

2031113394 is a wasteful number, since it uses less digits than its factorization.

2031113394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2031113394 is about 45067.8754103186. The cubic root of 2031113394 is about 1266.4208636457.

Adding to 2031113394 its reverse (4933111302), we get a palindrome (6964224696).

The spelling of 2031113394 in words is "two billion, thirty-one million, one hundred thirteen thousand, three hundred ninety-four".