13336613621 has 4 divisors (see below), whose sum is σ = 13354959072. Its totient is φ = 13318268172.

The previous prime is 13336613573. The next prime is 13336613657. The reversal of 13336613621 is 12631663331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13336613621 - 2¹⁸ = 13336351477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13336613681) 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 3 ways as a sum of consecutive naturals, for example, 9171635 + ... + 9173088.

It is an arithmetic number, because the mean of its divisors is an integer number (3338739768).

Almost surely, 2^13336613621 is an apocalyptic number.

It is an amenable number.

13336613621 is a deficient number, since it is larger than the sum of its proper divisors (18345451).

13336613621 is an equidigital number, since it uses as much as digits as its factorization.

13336613621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18345450.

The product of its digits is 34992, while the sum is 35.

The spelling of 13336613621 in words is "thirteen billion, three hundred thirty-six million, six hundred thirteen thousand, six hundred twenty-one".