12035421643 has 16 divisors (see below), whose sum is σ = 14632925184. Its totient is φ = 9663212160.

The previous prime is 12035421599. The next prime is 12035421649. The reversal of 12035421643 is 34612453021.

It is not a de Polignac number, because 12035421643 - 2¹³ = 12035413451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12035421649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214555 + ... + 264772.

It is an arithmetic number, because the mean of its divisors is an integer number (914557824).

Almost surely, 2^12035421643 is an apocalyptic number.

12035421643 is a deficient number, since it is larger than the sum of its proper divisors (2597503541).

12035421643 is a wasteful number, since it uses less digits than its factorization.

12035421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479562.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 12035421643 its reverse (34612453021), we get a palindrome (46647874664).

The spelling of 12035421643 in words is "twelve billion, thirty-five million, four hundred twenty-one thousand, six hundred forty-three".