13105405521320 has 64 divisors (see below), whose sum is σ = 33732882069120. Its totient is φ = 4488846177024.

The previous prime is 13105405521287. The next prime is 13105405521401. The reversal of 13105405521320 is 2312550450131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22818542 + ... + 23385821.

It is an arithmetic number, because the mean of its divisors is an integer number (527076282330).

Almost surely, 2^{13105405521320} is an apocalyptic number.

13105405521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13105405521320 is an abundant number, since it is smaller than the sum of its proper divisors (20627476547800).

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

13105405521320 is a wasteful number, since it uses less digits than its factorization.

13105405521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46205394 (or 46205390 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 13105405521320 its reverse (2312550450131), we get a palindrome (15417955971451).

The spelling of 13105405521320 in words is "thirteen trillion, one hundred five billion, four hundred five million, five hundred twenty-one thousand, three hundred twenty".