13204521323 has 24 divisors (see below), whose sum is σ = 15537913632. Its totient is φ = 11187880704.

The previous prime is 13204521293. The next prime is 13204521359. The reversal of 13204521323 is 32312540231.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13204521323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13204521292 and 13204521301.

It is not an unprimeable number, because it can be changed into a prime (13204521383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2195186 + ... + 2201192.

It is an arithmetic number, because the mean of its divisors is an integer number (647413068).

Almost surely, 2^13204521323 is an apocalyptic number.

13204521323 is a deficient number, since it is larger than the sum of its proper divisors (2333392309).

13204521323 is a wasteful number, since it uses less digits than its factorization.

13204521323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531 (or 6524 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The spelling of 13204521323 in words is "thirteen billion, two hundred four million, five hundred twenty-one thousand, three hundred twenty-three".