2099881830 has 128 divisors (see below), whose sum is σ = 5428684800. Its totient is φ = 518538240.

The previous prime is 2099881829. The next prime is 2099881841. The reversal of 2099881830 is 381889902.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2099881830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5629524 + ... + 5629896.

It is an arithmetic number, because the mean of its divisors is an integer number (42411600).

Almost surely, 2^2099881830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2099881830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2714342400).

2099881830 is an abundant number, since it is smaller than the sum of its proper divisors (3328802970).

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

2099881830 is a wasteful number, since it uses less digits than its factorization.

2099881830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 2099881830 is about 45824.4675910152. The cubic root of 2099881830 is about 1280.5551445306. Note that the first 3 decimals are identical.

The spelling of 2099881830 in words is "two billion, ninety-nine million, eight hundred eighty-one thousand, eight hundred thirty".