13321332520 has 32 divisors (see below), whose sum is σ = 30044230920. Its totient is φ = 5315869440.

The previous prime is 13321332517. The next prime is 13321332551. The reversal of 13321332520 is 2523312331.

It can be written as a sum of positive squares in 4 ways, for example, as 3288104964 + 10033227556 = 57342^2 + 100166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378687 + ... + 412366.

Almost surely, 2^13321332520 is an apocalyptic number.

13321332520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13321332520 is an abundant number, since it is smaller than the sum of its proper divisors (16722898400).

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

13321332520 is a wasteful number, since it uses less digits than its factorization.

13321332520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791485 (or 791481 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 13321332520 its reverse (2523312331), we get a palindrome (15844644851).

The spelling of 13321332520 in words is "thirteen billion, three hundred twenty-one million, three hundred thirty-two thousand, five hundred twenty".