13823126818 has 4 divisors (see below), whose sum is σ = 20734690230. Its totient is φ = 6911563408.

The previous prime is 13823126813. The next prime is 13823126873. The reversal of 13823126818 is 81862132831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81862132831 = 83 ⋅986290757.

It can be written as a sum of positive squares in only one way, i.e., 13765624929 + 57501889 = 117327^2 + 7583^2 .

It is not an unprimeable number, because it can be changed into a prime (13823126813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3455781703 + ... + 3455781706.

Almost surely, 2^13823126818 is an apocalyptic number.

13823126818 is a deficient number, since it is larger than the sum of its proper divisors (6911563412).

13823126818 is an equidigital number, since it uses as much as digits as its factorization.

13823126818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911563411.

The product of its digits is 110592, while the sum is 43.

The spelling of 13823126818 in words is "thirteen billion, eight hundred twenty-three million, one hundred twenty-six thousand, eight hundred eighteen".