12342215438 has 16 divisors (see below), whose sum is σ = 21650133120. Its totient is φ = 5166508536.

The previous prime is 12342215383. The next prime is 12342215443. The reversal of 12342215438 is 83451224321.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12342215398 and 12342215407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10250408 + ... + 10251611.

It is an arithmetic number, because the mean of its divisors is an integer number (1353133320).

Almost surely, 2^12342215438 is an apocalyptic number.

12342215438 is a deficient number, since it is larger than the sum of its proper divisors (9307917682).

12342215438 is a wasteful number, since it uses less digits than its factorization.

12342215438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20502071.

The product of its digits is 46080, while the sum is 35.

Adding to 12342215438 its reverse (83451224321), we get a palindrome (95793439759).

The spelling of 12342215438 in words is "twelve billion, three hundred forty-two million, two hundred fifteen thousand, four hundred thirty-eight".