2081183940 has 144 divisors (see below), whose sum is σ = 6909477120. Its totient is φ = 502871040.

The previous prime is 2081183939. The next prime is 2081183953. The reversal of 2081183940 is 493811802.

It is a super-2 number, since 2×2081183940² = 8662653184227847200, which contains 22 as substring.

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 = 2081183895 and 2081183904.

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 47 ways as a sum of consecutive naturals, for example, 665701 + ... + 668819.

It is an arithmetic number, because the mean of its divisors is an integer number (47982480).

Almost surely, 2^2081183940 is an apocalyptic number.

2081183940 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 2081183940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3454738560).

2081183940 is an abundant number, since it is smaller than the sum of its proper divisors (4828293180).

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

2081183940 is a wasteful number, since it uses less digits than its factorization.

2081183940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2081183940 is about 45619.9949583513. The cubic root of 2081183940 is about 1276.7430094152.

The spelling of 2081183940 in words is "two billion, eighty-one million, one hundred eighty-three thousand, nine hundred forty".