2105774109 has 12 divisors (see below), whose sum is σ = 3043657500. Its totient is φ = 1402933824.

The previous prime is 2105774057. The next prime is 2105774119. The reversal of 2105774109 is 9014775012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1016972100 + 1088802009 = 31890^2 + 32997^2 .

It is not a de Polignac number, because 2105774109 - 2¹³ = 2105765917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105774119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61584 + ... + 89465.

It is an arithmetic number, because the mean of its divisors is an integer number (253638125).

Almost surely, 2^2105774109 is an apocalyptic number.

It is an amenable number.

2105774109 is a deficient number, since it is larger than the sum of its proper divisors (937883391).

2105774109 is a wasteful number, since it uses less digits than its factorization.

2105774109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152604 (or 152601 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 2105774109 is about 45888.7143968972. The cubic root of 2105774109 is about 1281.7517740416.

The spelling of 2105774109 in words is "two billion, one hundred five million, seven hundred seventy-four thousand, one hundred nine".