2099571840 has 320 divisors, whose sum is σ = 7591070520. Its totient is φ = 552960000.

The previous prime is 2099571823. The next prime is 2099571847. The reversal of 2099571840 is 481759902.

It can be written as a sum of positive squares in 4 ways, for example, as 2037980736 + 61591104 = 45144^2 + 7848^2 .

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×2099571840² = 8816403822641971200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2099571847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5235640 + ... + 5236040.

Almost surely, 2^2099571840 is an apocalyptic number.

2099571840 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 2099571840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3795535260).

2099571840 is an abundant number, since it is smaller than the sum of its proper divisors (5491498680).

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

2099571840 is a wasteful number, since it uses less digits than its factorization.

2099571840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 2099571840 is about 45821.0851028214. The cubic root of 2099571840 is about 1280.4921284728.

The spelling of 2099571840 in words is "two billion, ninety-nine million, five hundred seventy-one thousand, eight hundred forty".