13420638448 has 80 divisors (see below), whose sum is σ = 31306528000. Its totient is φ = 5444568576.

The previous prime is 13420638443. The next prime is 13420638503. The reversal of 13420638448 is 84483602431.

It is a super-2 number, since 2×13420638448² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420638443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4443883 + ... + 4446901.

It is an arithmetic number, because the mean of its divisors is an integer number (391331600).

Almost surely, 2^13420638448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13420638448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15653264000).

13420638448 is an abundant number, since it is smaller than the sum of its proper divisors (17885889552).

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

13420638448 is a wasteful number, since it uses less digits than its factorization.

13420638448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142 (or 5136 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 13420638448 in words is "thirteen billion, four hundred twenty million, six hundred thirty-eight thousand, four hundred forty-eight".