2011830820 has 12 divisors (see below), whose sum is σ = 4224844764. Its totient is φ = 804732320.

The previous prime is 2011830803. The next prime is 2011830883. The reversal of 2011830820 is 280381102.

It can be written as a sum of positive squares in 2 ways, for example, as 552438016 + 1459392804 = 23504^2 + 38202^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50295751 + ... + 50295790.

It is an arithmetic number, because the mean of its divisors is an integer number (352070397).

Almost surely, 2^2011830820 is an apocalyptic number.

2011830820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011830820 is an abundant number, since it is smaller than the sum of its proper divisors (2213013944).

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

2011830820 is a wasteful number, since it uses less digits than its factorization.

2011830820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100591550 (or 100591548 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 2011830820 is about 44853.4371035264. The cubic root of 2011830820 is about 1262.4004838724.

The spelling of 2011830820 in words is "two billion, eleven million, eight hundred thirty thousand, eight hundred twenty".