12347474321 has 16 divisors (see below), whose sum is σ = 15347367168. Its totient is φ = 9672696000.

The previous prime is 12347474317. The next prime is 12347474327.

12347474321 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12347474321 - 2² = 12347474317 is a prime.

It is a super-2 number, since 2×12347474321² (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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12347474327) 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, 662525 + ... + 680906.

It is an arithmetic number, because the mean of its divisors is an integer number (959210448).

Almost surely, 2^12347474321 is an apocalyptic number.

It is an amenable number.

12347474321 is a deficient number, since it is larger than the sum of its proper divisors (2999892847).

12347474321 is a wasteful number, since it uses less digits than its factorization.

12347474321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343552.

The product of its digits is 112896, while the sum is 38.

The spelling of 12347474321 in words is "twelve billion, three hundred forty-seven million, four hundred seventy-four thousand, three hundred twenty-one".