2101339845 has 72 divisors (see below), whose sum is σ = 4044241656. Its totient is φ = 1008480000.

The previous prime is 2101339769. The next prime is 2101339847. The reversal of 2101339845 is 5489331012.

2101339845 is a `hidden beast` number, since 210 + 13 + 398 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1175598369 + 925741476 = 34287^2 + 30426^2 .

It is not a de Polignac number, because 2101339845 - 2¹⁰ = 2101338821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101339847) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 548035 + ... + 551855.

It is an arithmetic number, because the mean of its divisors is an integer number (56170023).

Almost surely, 2^2101339845 is an apocalyptic number.

It is an amenable number.

2101339845 is a deficient number, since it is larger than the sum of its proper divisors (1942901811).

2101339845 is a wasteful number, since it uses less digits than its factorization.

2101339845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2101339845 is about 45840.3735259651. The cubic root of 2101339845 is about 1280.8514527366.

The spelling of 2101339845 in words is "two billion, one hundred one million, three hundred thirty-nine thousand, eight hundred forty-five".