12921974863 has 4 divisors (see below), whose sum is σ = 14767971280. Its totient is φ = 11075978448.

The previous prime is 12921974837. The next prime is 12921974887. The reversal of 12921974863 is 36847912921.

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

It is a cyclic number.

It is not a de Polignac number, because 12921974863 - 2¹⁷ = 12921843791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12921974863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921974963) 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, 922998198 + ... + 922998211.

It is an arithmetic number, because the mean of its divisors is an integer number (3691992820).

Almost surely, 2^12921974863 is an apocalyptic number.

12921974863 is a deficient number, since it is larger than the sum of its proper divisors (1845996417).

12921974863 is an equidigital number, since it uses as much as digits as its factorization.

12921974863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845996416.

The product of its digits is 1306368, while the sum is 52.

The spelling of 12921974863 in words is "twelve billion, nine hundred twenty-one million, nine hundred seventy-four thousand, eight hundred sixty-three".