13521344220 has 72 divisors (see below), whose sum is σ = 41035053696. Its totient is φ = 3603906432.

The previous prime is 13521344149. The next prime is 13521344233. The reversal of 13521344220 is 2244312531.

13521344220 is a `hidden beast` number, since 1 + 3 + 5 + 213 + 442 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368214 + ... + 403266.

Almost surely, 2^13521344220 is an apocalyptic number.

13521344220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13521344220 is an abundant number, since it is smaller than the sum of its proper divisors (27513709476).

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

13521344220 is a wasteful number, since it uses less digits than its factorization.

13521344220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37211 (or 37206 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 13521344220 its reverse (2244312531), we get a palindrome (15765656751).

The spelling of 13521344220 in words is "thirteen billion, five hundred twenty-one million, three hundred forty-four thousand, two hundred twenty".