12817031723 has 24 divisors (see below), whose sum is σ = 13708593360. Its totient is φ = 11980560960.

The previous prime is 12817031707. The next prime is 12817031729. The reversal of 12817031723 is 32713071821.

It is not a de Polignac number, because 12817031723 - 2⁴ = 12817031707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817031729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12079613 + ... + 12080673.

It is an arithmetic number, because the mean of its divisors is an integer number (571191390).

Almost surely, 2^12817031723 is an apocalyptic number.

12817031723 is a deficient number, since it is larger than the sum of its proper divisors (891561637).

12817031723 is a wasteful number, since it uses less digits than its factorization.

12817031723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 12817031723 in words is "twelve billion, eight hundred seventeen million, thirty-one thousand, seven hundred twenty-three".