13421302520 has 32 divisors (see below), whose sum is σ = 30561768720. Its totient is φ = 5303838720.

The previous prime is 13421302513. The next prime is 13421302523. The reversal of 13421302520 is 2520312431.

It is a super-2 number, since 2×13421302520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421302523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017961 + ... + 2024600.

Almost surely, 2^13421302520 is an apocalyptic number.

13421302520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421302520 is an abundant number, since it is smaller than the sum of its proper divisors (17140466200).

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

13421302520 is a wasteful number, since it uses less digits than its factorization.

13421302520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042655 (or 4042651 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 13421302520 its reverse (2520312431), we get a palindrome (15941614951).

The spelling of 13421302520 in words is "thirteen billion, four hundred twenty-one million, three hundred two thousand, five hundred twenty".