12939393938 has 16 divisors (see below), whose sum is σ = 19925858304. Its totient is φ = 6298883040.

The previous prime is 12939393937. The next prime is 12939393953. The reversal of 12939393938 is 83939393921.

It is a super-2 number, since 2×12939393938² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12939393937) by changing a digit.

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, 342395 + ... + 378302.

It is an arithmetic number, because the mean of its divisors is an integer number (1245366144).

Almost surely, 2^12939393938 is an apocalyptic number.

12939393938 is a deficient number, since it is larger than the sum of its proper divisors (6986464366).

12939393938 is a wasteful number, since it uses less digits than its factorization.

12939393938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720937.

The product of its digits is 8503056, while the sum is 59.

The spelling of 12939393938 in words is "twelve billion, nine hundred thirty-nine million, three hundred ninety-three thousand, nine hundred thirty-eight".