12002115838 has 16 divisors (see below), whose sum is σ = 19095251904. Its totient is φ = 5638256640.

The previous prime is 12002115799. The next prime is 12002115857. The reversal of 12002115838 is 83851120021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286278 + ... + 325513.

It is an arithmetic number, because the mean of its divisors is an integer number (1193453244).

Almost surely, 2^12002115838 is an apocalyptic number.

12002115838 is a deficient number, since it is larger than the sum of its proper divisors (7093136066).

12002115838 is a wasteful number, since it uses less digits than its factorization.

12002115838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612387.

The product of its (nonzero) digits is 3840, while the sum is 31.

Adding to 12002115838 its reverse (83851120021), we get a palindrome (95853235859).

The spelling of 12002115838 in words is "twelve billion, two million, one hundred fifteen thousand, eight hundred thirty-eight".