2129019849 has 32 divisors (see below), whose sum is σ = 3533854080. Its totient is φ = 1255435200.

The previous prime is 2129019847. The next prime is 2129019857. The reversal of 2129019849 is 9489109212.

It is not a de Polignac number, because 2129019849 - 2¹ = 2129019847 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2129019847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85882 + ... + 107859.

It is an arithmetic number, because the mean of its divisors is an integer number (110432940).

Almost surely, 2^2129019849 is an apocalyptic number.

It is an amenable number.

2129019849 is a deficient number, since it is larger than the sum of its proper divisors (1404834231).

2129019849 is a wasteful number, since it uses less digits than its factorization.

2129019849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193798 (or 193792 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 2129019849 is about 46141.3030700261. The cubic root of 2129019849 is about 1286.4509641882.

The spelling of 2129019849 in words is "two billion, one hundred twenty-nine million, nineteen thousand, eight hundred forty-nine".