2031395940 has 216 divisors, whose sum is σ = 7237109880. Its totient is φ = 459841536.

The previous prime is 2031395939. The next prime is 2031395969. The reversal of 2031395940 is 495931302.

It is a happy number.

2031395940 is a `hidden beast` number, since 2 + 0 + 31 + 39 + 594 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4235364 + 2027160576 = 2058^2 + 45024^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2031395895 and 2031395904.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 960324 + ... + 962436.

Almost surely, 2^2031395940 is an apocalyptic number.

2031395940 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 2031395940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3618554940).

2031395940 is an abundant number, since it is smaller than the sum of its proper divisors (5205713940).

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

2031395940 is a wasteful number, since it uses less digits than its factorization.

2031395940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 2031395940 is about 45071.0099731524. The cubic root of 2031395940 is about 1266.4795844044.

The spelling of 2031395940 in words is "two billion, thirty-one million, three hundred ninety-five thousand, nine hundred forty".