13535521019 has 4 divisors (see below), whose sum is σ = 13865655720. Its totient is φ = 13205386320.

The previous prime is 13535520997. The next prime is 13535521031. The reversal of 13535521019 is 91012553531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13535521019 - 2¹² = 13535516923 is a prime.

It is a super-2 number, since 2×13535521019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13535521019.

It is not an unprimeable number, because it can be changed into a prime (13535521099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165067289 + ... + 165067370.

It is an arithmetic number, because the mean of its divisors is an integer number (3466413930).

Almost surely, 2^13535521019 is an apocalyptic number.

13535521019 is a deficient number, since it is larger than the sum of its proper divisors (330134701).

13535521019 is an equidigital number, since it uses as much as digits as its factorization.

13535521019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330134700.

The product of its (nonzero) digits is 20250, while the sum is 35.

The spelling of 13535521019 in words is "thirteen billion, five hundred thirty-five million, five hundred twenty-one thousand, nineteen".