2081953009 has 4 divisors (see below), whose sum is σ = 2082418240. Its totient is φ = 2081487780.

The previous prime is 2081952989. The next prime is 2081953021. The reversal of 2081953009 is 9003591802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2081953009 - 2²¹ = 2079855857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081953039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225837 + ... + 234874.

It is an arithmetic number, because the mean of its divisors is an integer number (520604560).

Almost surely, 2^2081953009 is an apocalyptic number.

It is an amenable number.

2081953009 is a deficient number, since it is larger than the sum of its proper divisors (465231).

2081953009 is an equidigital number, since it uses as much as digits as its factorization.

2081953009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465230.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 2081953009 is about 45628.4232578773. The cubic root of 2081953009 is about 1276.9002568560.

The spelling of 2081953009 in words is "two billion, eighty-one million, nine hundred fifty-three thousand, nine".