12638830333 has 4 divisors (see below), whose sum is σ = 12980420380. Its totient is φ = 12297240288.

The previous prime is 12638830327. The next prime is 12638830361. The reversal of 12638830333 is 33303883621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33303883621 = 211 ⋅157838311.

It can be written as a sum of positive squares in 2 ways, for example, as 4358376324 + 8280454009 = 66018^2 + 90997^2 .

It is a cyclic number.

It is not a de Polignac number, because 12638830333 - 2⁹ = 12638829821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638830363) 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, 170794968 + ... + 170795041.

It is an arithmetic number, because the mean of its divisors is an integer number (3245105095).

Almost surely, 2^12638830333 is an apocalyptic number.

It is an amenable number.

12638830333 is a deficient number, since it is larger than the sum of its proper divisors (341590047).

12638830333 is an equidigital number, since it uses as much as digits as its factorization.

12638830333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341590046.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 12638830333 in words is "twelve billion, six hundred thirty-eight million, eight hundred thirty thousand, three hundred thirty-three".