13105521819 has 32 divisors (see below), whose sum is σ = 20916080640. Its totient is φ = 8062242336.

The previous prime is 13105521809. The next prime is 13105521827. The reversal of 13105521819 is 91812550131.

13105521819 is a `hidden beast` number, since 13 + 10 + 552 + 1 + 81 + 9 = 666.

It is not a de Polignac number, because 13105521819 - 2⁵ = 13105521787 is a prime.

It is a super-2 number, since 2×13105521819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13105521809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1746694 + ... + 1754180.

It is an arithmetic number, because the mean of its divisors is an integer number (653627520).

Almost surely, 2^13105521819 is an apocalyptic number.

13105521819 is a deficient number, since it is larger than the sum of its proper divisors (7810558821).

13105521819 is a wasteful number, since it uses less digits than its factorization.

13105521819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12496 (or 12490 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The spelling of 13105521819 in words is "thirteen billion, one hundred five million, five hundred twenty-one thousand, eight hundred nineteen".