13660831420 has 24 divisors (see below), whose sum is σ = 29463092064. Its totient is φ = 5316647616.

The previous prime is 13660831417. The next prime is 13660831427. The reversal of 13660831420 is 2413806631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660831427) 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 7 ways as a sum of consecutive naturals, for example, 9229552 + ... + 9231031.

It is an arithmetic number, because the mean of its divisors is an integer number (1227628836).

Almost surely, 2^13660831420 is an apocalyptic number.

13660831420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13660831420 is an abundant number, since it is smaller than the sum of its proper divisors (15802260644).

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

13660831420 is a wasteful number, since it uses less digits than its factorization.

13660831420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18460629 (or 18460627 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 13660831420 in words is "thirteen billion, six hundred sixty million, eight hundred thirty-one thousand, four hundred twenty".