12823135138 has 16 divisors (see below), whose sum is σ = 21379225536. Its totient is φ = 5718721840.

The previous prime is 12823135133. The next prime is 12823135141. The reversal of 12823135138 is 83153132821.

It is a junction number, because it is equal to n+sod(n) for n = 12823135097 and 12823135106.

It is not an unprimeable number, because it can be changed into a prime (12823135133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5497606 + ... + 5499937.

It is an arithmetic number, because the mean of its divisors is an integer number (1336201596).

Almost surely, 2^12823135138 is an apocalyptic number.

12823135138 is a deficient number, since it is larger than the sum of its proper divisors (8556090398).

12823135138 is a wasteful number, since it uses less digits than its factorization.

12823135138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997609.

The product of its digits is 34560, while the sum is 37.

Adding to 12823135138 its reverse (83153132821), we get a palindrome (95976267959).

The spelling of 12823135138 in words is "twelve billion, eight hundred twenty-three million, one hundred thirty-five thousand, one hundred thirty-eight".