13020343523 has 8 divisors (see below), whose sum is σ = 14254205376. Its totient is φ = 11794847400.

The previous prime is 13020343519. The next prime is 13020343559. The reversal of 13020343523 is 32534302031.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13020343523 - 2² = 13020343519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13020343492 and 13020343501.

It is not an unprimeable number, because it can be changed into a prime (13020343513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088173 + ... + 2094398.

It is an arithmetic number, because the mean of its divisors is an integer number (1781775672).

Almost surely, 2^13020343523 is an apocalyptic number.

13020343523 is a deficient number, since it is larger than the sum of its proper divisors (1233861853).

13020343523 is a wasteful number, since it uses less digits than its factorization.

13020343523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182865.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 13020343523 its reverse (32534302031), we get a palindrome (45554645554).

The spelling of 13020343523 in words is "thirteen billion, twenty million, three hundred forty-three thousand, five hundred twenty-three".