2000109991 has 16 divisors (see below), whose sum is σ = 2228095008. Its totient is φ = 1780185600.

The previous prime is 2000109967. The next prime is 2000110009. The reversal of 2000109991 is 1999010002.

It is a cyclic number.

It is not a de Polignac number, because 2000109991 - 2¹¹ = 2000107943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000109941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100921 + ... + 119101.

It is an arithmetic number, because the mean of its divisors is an integer number (139255938).

Almost surely, 2^2000109991 is an apocalyptic number.

2000109991 is a deficient number, since it is larger than the sum of its proper divisors (227985017).

2000109991 is a wasteful number, since it uses less digits than its factorization.

2000109991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18402.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 2000109991 is about 44722.5892698533. The cubic root of 2000109991 is about 1259.9441461342.

Adding to 2000109991 its reverse (1999010002), we get a palindrome (3999119993).

The spelling of 2000109991 in words is "two billion, one hundred nine thousand, nine hundred ninety-one".