13221886520 has 16 divisors (see below), whose sum is σ = 29749244760. Its totient is φ = 5288754592.

The previous prime is 13221886507. The next prime is 13221886523. The reversal of 13221886520 is 2568812231.

It is a super-4 number, since 4×13221886520⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221886523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165273542 + ... + 165273621.

Almost surely, 2^13221886520 is an apocalyptic number.

13221886520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221886520 is an abundant number, since it is smaller than the sum of its proper divisors (16527358240).

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

13221886520 is a wasteful number, since it uses less digits than its factorization.

13221886520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330547174 (or 330547170 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 13221886520 in words is "thirteen billion, two hundred twenty-one million, eight hundred eighty-six thousand, five hundred twenty".