12521343893 has 8 divisors (see below), whose sum is σ = 12632079360. Its totient is φ = 12410798400.

The previous prime is 12521343841. The next prime is 12521343917. The reversal of 12521343893 is 39834312521.

12521343893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521343893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12521343893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521343803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86573 + ... + 180381.

It is an arithmetic number, because the mean of its divisors is an integer number (1579009920).

Almost surely, 2^12521343893 is an apocalyptic number.

It is an amenable number.

12521343893 is a deficient number, since it is larger than the sum of its proper divisors (110735467).

12521343893 is a wasteful number, since it uses less digits than its factorization.

12521343893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94987.

The product of its digits is 155520, while the sum is 41.

The spelling of 12521343893 in words is "twelve billion, five hundred twenty-one million, three hundred forty-three thousand, eight hundred ninety-three".