12673037621 has 4 divisors (see below), whose sum is σ = 12675485100. Its totient is φ = 12670590144.

The previous prime is 12673037591. The next prime is 12673037623.

12673037621 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9319006225 + 3354031396 = 96535^2 + 57914^2 .

It is a cyclic number.

It is not a de Polignac number, because 12673037621 - 2¹⁴ = 12673021237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12673037623) 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, 1215956 + ... + 1226333.

It is an arithmetic number, because the mean of its divisors is an integer number (3168871275).

Almost surely, 2^12673037621 is an apocalyptic number.

It is an amenable number.

12673037621 is a deficient number, since it is larger than the sum of its proper divisors (2447479).

12673037621 is an equidigital number, since it uses as much as digits as its factorization.

12673037621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447478.

The product of its (nonzero) digits is 63504, while the sum is 38.

The spelling of 12673037621 in words is "twelve billion, six hundred seventy-three million, thirty-seven thousand, six hundred twenty-one".