13440451420 has 96 divisors (see below), whose sum is σ = 32474131200. Its totient is φ = 4621248000.

The previous prime is 13440451417. The next prime is 13440451433. The reversal of 13440451420 is 2415404431.

It is a congruent number.

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, 2375595 + ... + 2381245.

It is an arithmetic number, because the mean of its divisors is an integer number (338272200).

Almost surely, 2^13440451420 is an apocalyptic number.

13440451420 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 13440451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16237065600).

13440451420 is an abundant number, since it is smaller than the sum of its proper divisors (19033679780).

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

13440451420 is a wasteful number, since it uses less digits than its factorization.

13440451420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6259 (or 6257 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 13440451420 its reverse (2415404431), we get a palindrome (15855855851).

The spelling of 13440451420 in words is "thirteen billion, four hundred forty million, four hundred fifty-one thousand, four hundred twenty".