2081913005 has 4 divisors (see below), whose sum is σ = 2498295612. Its totient is φ = 1665530400.

The previous prime is 2081912969. The next prime is 2081913013. The reversal of 2081913005 is 5003191802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 717275524 + 1364637481 = 26782^2 + 36941^2 .

It is not a de Polignac number, because 2081913005 - 2¹² = 2081908909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208191296 + ... + 208191305.

It is an arithmetic number, because the mean of its divisors is an integer number (624573903).

Almost surely, 2^2081913005 is an apocalyptic number.

It is an amenable number.

2081913005 is a deficient number, since it is larger than the sum of its proper divisors (416382607).

2081913005 is an equidigital number, since it uses as much as digits as its factorization.

2081913005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416382606.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 2081913005 is about 45627.9848886624. The cubic root of 2081913005 is about 1276.8920784061.

The spelling of 2081913005 in words is "two billion, eighty-one million, nine hundred thirteen thousand, five".