2099862180 has 108 divisors (see below), whose sum is σ = 6897339540. Its totient is φ = 516881664.

The previous prime is 2099862143. The next prime is 2099862217. The reversal of 2099862180 is 812689902.

It is an interprime number because it is at equal distance from previous prime (2099862143) and next prime (2099862217).

It can be written as a sum of positive squares in 6 ways, for example, as 617920164 + 1481942016 = 24858^2 + 38496^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4095 + ... + 64934.

It is an arithmetic number, because the mean of its divisors is an integer number (63864255).

Almost surely, 2^2099862180 is an apocalyptic number.

2099862180 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 2099862180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3448669770).

2099862180 is an abundant number, since it is smaller than the sum of its proper divisors (4797477360).

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

2099862180 is a wasteful number, since it uses less digits than its factorization.

2099862180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69070 (or 69052 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 2099862180 is about 45824.2531854039. The cubic root of 2099862180 is about 1280.5511501809.

The spelling of 2099862180 in words is "two billion, ninety-nine million, eight hundred sixty-two thousand, one hundred eighty".