13405343520 has 48 divisors (see below), whose sum is σ = 42226833600. Its totient is φ = 3574758144.

The previous prime is 13405343519. The next prime is 13405343533. The reversal of 13405343520 is 2534350431.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 13963420 + ... + 13964379.

It is an arithmetic number, because the mean of its divisors is an integer number (879725700).

Almost surely, 2^13405343520 is an apocalyptic number.

13405343520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13405343520 is an abundant number, since it is smaller than the sum of its proper divisors (28821490080).

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

13405343520 is a wasteful number, since it uses less digits than its factorization.

13405343520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27927817 (or 27927809 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 13405343520 its reverse (2534350431), we get a palindrome (15939693951).

The spelling of 13405343520 in words is "thirteen billion, four hundred five million, three hundred forty-three thousand, five hundred twenty".