13444420320 has 72 divisors (see below), whose sum is σ = 45879089256. Its totient is φ = 3585178368.

The previous prime is 13444420309. The next prime is 13444420321. The reversal of 13444420320 is 2302444431.

It is a happy number.

13444420320 is a `hidden beast` number, since 13 + 4 + 444 + 203 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444420321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4666762 + ... + 4669641.

It is an arithmetic number, because the mean of its divisors is an integer number (637209573).

Almost surely, 2^13444420320 is an apocalyptic number.

13444420320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13444420320 is an abundant number, since it is smaller than the sum of its proper divisors (32434668936).

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

13444420320 is a wasteful number, since it uses less digits than its factorization.

13444420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336424 (or 9336413 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 13444420320 its reverse (2302444431), we get a palindrome (15746864751).

The spelling of 13444420320 in words is "thirteen billion, four hundred forty-four million, four hundred twenty thousand, three hundred twenty".