2101864089 has 32 divisors (see below), whose sum is σ = 3086947584. Its totient is φ = 1264124160.

The previous prime is 2101864087. The next prime is 2101864147. The reversal of 2101864089 is 9804681012.

It is not a de Polignac number, because 2101864089 - 2¹ = 2101864087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2101864081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570724 + ... + 574394.

It is an arithmetic number, because the mean of its divisors is an integer number (96467112).

Almost surely, 2^2101864089 is an apocalyptic number.

It is an amenable number.

2101864089 is a deficient number, since it is larger than the sum of its proper divisors (985083495).

2101864089 is a wasteful number, since it uses less digits than its factorization.

2101864089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 2101864089 is about 45846.0913164907. The cubic root of 2101864089 is about 1280.9579598394.

The spelling of 2101864089 in words is "two billion, one hundred one million, eight hundred sixty-four thousand, eighty-nine".