2011011989 has 24 divisors (see below), whose sum is σ = 2429465400. Its totient is φ = 1657783680.

The previous prime is 2011011953. The next prime is 2011011997. The reversal of 2011011989 is 9891101102.

It can be written as a sum of positive squares in 4 ways, for example, as 142611364 + 1868400625 = 11942^2 + 43225^2 .

It is not a de Polignac number, because 2011011989 - 2⁸ = 2011011733 is a prime.

It is a super-2 number, since 2×2011011989² = 8088338439803472242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011011389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379619 + ... + 384879.

It is an arithmetic number, because the mean of its divisors is an integer number (101227725).

Almost surely, 2^2011011989 is an apocalyptic number.

2011011989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2011011989 is a deficient number, since it is larger than the sum of its proper divisors (418453411).

2011011989 is a wasteful number, since it uses less digits than its factorization.

2011011989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 2011011989 is about 44844.3083233536. The cubic root of 2011011989 is about 1262.2291916490.

The spelling of 2011011989 in words is "two billion, eleven million, eleven thousand, nine hundred eighty-nine".