12963836921 has 16 divisors (see below), whose sum is σ = 15130696320. Its totient is φ = 10878172800.

The previous prime is 12963836917. The next prime is 12963836923.

It is a happy number.

12963836921 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12963836921 - 2² = 12963836917 is a prime.

It is a super-2 number, since 2×12963836921² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12963836921.

It is not an unprimeable number, because it can be changed into a prime (12963836923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40091 + ... + 165936.

It is an arithmetic number, because the mean of its divisors is an integer number (945668520).

Almost surely, 2^12963836921 is an apocalyptic number.

It is an amenable number.

12963836921 is a deficient number, since it is larger than the sum of its proper divisors (2166859399).

12963836921 is a wasteful number, since it uses less digits than its factorization.

12963836921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206224.

The product of its digits is 839808, while the sum is 50.

The spelling of 12963836921 in words is "twelve billion, nine hundred sixty-three million, eight hundred thirty-six thousand, nine hundred twenty-one".