12535893721 has 32 divisors (see below), whose sum is σ = 14784215040. Its totient is φ = 10523575296.

The previous prime is 12535893709. The next prime is 12535893737. The reversal of 12535893721 is 12739853521.

It is a de Polignac number, because none of the positive numbers 2^k-12535893721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12535893781) 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 31 ways as a sum of consecutive naturals, for example, 812935 + ... + 828211.

It is an arithmetic number, because the mean of its divisors is an integer number (462006720).

Almost surely, 2^12535893721 is an apocalyptic number.

It is an amenable number.

12535893721 is a deficient number, since it is larger than the sum of its proper divisors (2248321319).

12535893721 is a wasteful number, since it uses less digits than its factorization.

12535893721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15433.

The product of its digits is 453600, while the sum is 46.

The spelling of 12535893721 in words is "twelve billion, five hundred thirty-five million, eight hundred ninety-three thousand, seven hundred twenty-one".