2011899005 has 4 divisors (see below), whose sum is σ = 2414278812. Its totient is φ = 1609519200.

The previous prime is 2011898989. The next prime is 2011899047. The reversal of 2011899005 is 5009981102.

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 718561636 + 1293337369 = 26806^2 + 35963^2 .

It is not a de Polignac number, because 2011899005 - 2⁴ = 2011898989 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, 201189896 + ... + 201189905.

It is an arithmetic number, because the mean of its divisors is an integer number (603569703).

Almost surely, 2^2011899005 is an apocalyptic number.

It is an amenable number.

2011899005 is a deficient number, since it is larger than the sum of its proper divisors (402379807).

2011899005 is an equidigital number, since it uses as much as digits as its factorization.

2011899005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402379806.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 2011899005 is about 44854.1971837642. The cubic root of 2011899005 is about 1262.4147454766.

The spelling of 2011899005 in words is "two billion, eleven million, eight hundred ninety-nine thousand, five".