13212344420 has 96 divisors (see below), whose sum is σ = 30645578880. Its totient is φ = 4744995840.

The previous prime is 13212344371. The next prime is 13212344437. The reversal of 13212344420 is 2444321231.

It is a self number, because there is not a number n which added to its sum of digits gives 13212344420.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6181592 + ... + 6183728.

It is an arithmetic number, because the mean of its divisors is an integer number (319224780).

Almost surely, 2^13212344420 is an apocalyptic number.

13212344420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13212344420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15322789440).

13212344420 is an abundant number, since it is smaller than the sum of its proper divisors (17433234460).

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

13212344420 is a wasteful number, since it uses less digits than its factorization.

13212344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 13212344420 its reverse (2444321231), we get a palindrome (15656665651).

The spelling of 13212344420 in words is "thirteen billion, two hundred twelve million, three hundred forty-four thousand, four hundred twenty".