2120806144 has 72 divisors (see below), whose sum is σ = 4469655680. Its totient is φ = 1001548800.

The previous prime is 2120806099. The next prime is 2120806159. The reversal of 2120806144 is 4416080212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3068839 + ... + 3069529.

Almost surely, 2^2120806144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120806144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234827840).

2120806144 is an abundant number, since it is smaller than the sum of its proper divisors (2348849536).

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

2120806144 is an equidigital number, since it uses as much as digits as its factorization.

2120806144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2120806144 is about 46052.2110652681. The cubic root of 2120806144 is about 1284.7944669682.

Adding to 2120806144 its reverse (4416080212), we get a palindrome (6536886356).

The spelling of 2120806144 in words is "two billion, one hundred twenty million, eight hundred six thousand, one hundred forty-four".