2031866920 has 64 divisors (see below), whose sum is σ = 4780944000. Its totient is φ = 775703808.

The previous prime is 2031866909. The next prime is 2031866927. The reversal of 2031866920 is 296681302.

It is a self number, because there is not a number n which added to its sum of digits gives 2031866920.

It is not an unprimeable number, because it can be changed into a prime (2031866927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466111 + ... + 470449.

It is an arithmetic number, because the mean of its divisors is an integer number (74702250).

Almost surely, 2^2031866920 is an apocalyptic number.

2031866920 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 2031866920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390472000).

2031866920 is an abundant number, since it is smaller than the sum of its proper divisors (2749077080).

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

2031866920 is a wasteful number, since it uses less digits than its factorization.

2031866920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882 (or 4878 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2031866920 is about 45076.2345366159. The cubic root of 2031866920 is about 1266.5774547819.

The spelling of 2031866920 in words is "two billion, thirty-one million, eight hundred sixty-six thousand, nine hundred twenty".