13247794921 has 8 divisors (see below), whose sum is σ = 13505282784. Its totient is φ = 12992637600.

The previous prime is 13247794883. The next prime is 13247794933. The reversal of 13247794921 is 12949774231.

13247794921 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 not a de Polignac number, because 13247794921 - 2¹⁵ = 13247762153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13247794951) 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, 571155 + ... + 593896.

It is an arithmetic number, because the mean of its divisors is an integer number (1688160348).

Almost surely, 2^13247794921 is an apocalyptic number.

It is an amenable number.

13247794921 is a deficient number, since it is larger than the sum of its proper divisors (257487863).

13247794921 is a wasteful number, since it uses less digits than its factorization.

13247794921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165271.

The product of its digits is 762048, while the sum is 49.

The spelling of 13247794921 in words is "thirteen billion, two hundred forty-seven million, seven hundred ninety-four thousand, nine hundred twenty-one".