13131821660 has 24 divisors (see below), whose sum is σ = 28097145216. Its totient is φ = 5153620160.

The previous prime is 13131821657. The next prime is 13131821693. The reversal of 13131821660 is 6612813131.

It is a super-2 number, since 2×13131821660² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6193196 + ... + 6195315.

It is an arithmetic number, because the mean of its divisors is an integer number (1170714384).

Almost surely, 2^13131821660 is an apocalyptic number.

13131821660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131821660 is an abundant number, since it is smaller than the sum of its proper divisors (14965323556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13131821660 is a wasteful number, since it uses less digits than its factorization.

13131821660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12388573 (or 12388571 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 13131821660 in words is "thirteen billion, one hundred thirty-one million, eight hundred twenty-one thousand, six hundred sixty".