12816905033 has 4 divisors (see below), whose sum is σ = 12817135380. Its totient is φ = 12816674688.

The previous prime is 12816905027. The next prime is 12816905071. The reversal of 12816905033 is 33050961821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33050961821 = 397 ⋅83251793.

It can be written as a sum of positive squares in 2 ways, for example, as 1081949449 + 11734955584 = 32893^2 + 108328^2 .

It is a cyclic number.

It is not a de Polignac number, because 12816905033 - 2¹² = 12816900937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12816905833) 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, 25841 + ... + 162177.

It is an arithmetic number, because the mean of its divisors is an integer number (3204283845).

Almost surely, 2^12816905033 is an apocalyptic number.

It is an amenable number.

12816905033 is a deficient number, since it is larger than the sum of its proper divisors (230347).

12816905033 is an equidigital number, since it uses as much as digits as its factorization.

12816905033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230346.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 12816905033 in words is "twelve billion, eight hundred sixteen million, nine hundred five thousand, thirty-three".