12705837428 has 24 divisors (see below), whose sum is σ = 22535654400. Its totient is φ = 6267639168.

The previous prime is 12705837427. The next prime is 12705837493. The reversal of 12705837428 is 82473850721.

It is a super-2 number, since 2×12705837428² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705837421) 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, 21068 + ... + 160796.

It is an arithmetic number, because the mean of its divisors is an integer number (938985600).

Almost surely, 2^12705837428 is an apocalyptic number.

It is an amenable number.

12705837428 is a deficient number, since it is larger than the sum of its proper divisors (9829816972).

12705837428 is a wasteful number, since it uses less digits than its factorization.

12705837428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140039 (or 140037 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 12705837428 in words is "twelve billion, seven hundred five million, eight hundred thirty-seven thousand, four hundred twenty-eight".