2011019985 has 24 divisors (see below), whose sum is σ = 3753905064. Its totient is φ = 990040320.

The previous prime is 2011019957. The next prime is 2011019999. The reversal of 2011019985 is 5899101102.

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 2010715281 = 552^2 + 44841^2 .

It is not a de Polignac number, because 2011019985 - 2⁸ = 2011019729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1718236 + ... + 1719405.

It is an arithmetic number, because the mean of its divisors is an integer number (156412711).

Almost surely, 2^2011019985 is an apocalyptic number.

It is an amenable number.

2011019985 is a deficient number, since it is larger than the sum of its proper divisors (1742885079).

2011019985 is a wasteful number, since it uses less digits than its factorization.

2011019985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437665 (or 3437662 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 2011019985 is about 44844.3974761619. The cubic root of 2011019985 is about 1262.2308645665.

The spelling of 2011019985 in words is "two billion, eleven million, nineteen thousand, nine hundred eighty-five".