13243117220 has 24 divisors (see below), whose sum is σ = 27823649784. Its totient is φ = 5294750976.

The previous prime is 13243117189. The next prime is 13243117243. The reversal of 13243117220 is 2271134231.

It can be written as a sum of positive squares in 4 ways, for example, as 1020930304 + 12222186916 = 31952^2 + 110554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13243117220.

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, 112187 + ... + 197666.

It is an arithmetic number, because the mean of its divisors is an integer number (1159318741).

Almost surely, 2^13243117220 is an apocalyptic number.

13243117220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13243117220 is an abundant number, since it is smaller than the sum of its proper divisors (14580532564).

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

13243117220 is a wasteful number, since it uses less digits than its factorization.

13243117220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311999 (or 311997 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 13243117220 in words is "thirteen billion, two hundred forty-three million, one hundred seventeen thousand, two hundred twenty".