2128109833 has 4 divisors (see below), whose sum is σ = 2128204548. Its totient is φ = 2128015120.

The previous prime is 2128109779. The next prime is 2128109857. The reversal of 2128109833 is 3389018212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 644550544 + 1483559289 = 25388^2 + 38517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128109833 is a prime.

It is a super-2 number, since 2×2128109833² = 9057702922622575778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2128109792 and 2128109801.

It is not an unprimeable number, because it can be changed into a prime (2128109033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7623 + ... + 65683.

It is an arithmetic number, because the mean of its divisors is an integer number (532051137).

Almost surely, 2^2128109833 is an apocalyptic number.

It is an amenable number.

2128109833 is a deficient number, since it is larger than the sum of its proper divisors (94715).

2128109833 is an equidigital number, since it uses as much as digits as its factorization.

2128109833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94714.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2128109833 is about 46131.4408294387. The cubic root of 2128109833 is about 1286.2676469999.

The spelling of 2128109833 in words is "two billion, one hundred twenty-eight million, one hundred nine thousand, eight hundred thirty-three".