13337808821 has 4 divisors (see below), whose sum is σ = 13338054444. Its totient is φ = 13337563200.

The previous prime is 13337808787. The next prime is 13337808823. The reversal of 13337808821 is 12880873331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6207864100 + 7129944721 = 78790^2 + 84439^2 .

It is a cyclic number.

It is not a de Polignac number, because 13337808821 - 2¹⁰ = 13337807797 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 (13337808823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 163331.

It is an arithmetic number, because the mean of its divisors is an integer number (3334513611).

Almost surely, 2^13337808821 is an apocalyptic number.

It is an amenable number.

13337808821 is a deficient number, since it is larger than the sum of its proper divisors (245623).

13337808821 is an equidigital number, since it uses as much as digits as its factorization.

13337808821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245622.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 13337808821 in words is "thirteen billion, three hundred thirty-seven million, eight hundred eight thousand, eight hundred twenty-one".