13204645 has 16 divisors (see below), whose sum is σ = 16646400. Its totient is φ = 10036224.

The previous prime is 13204643. The next prime is 13204649. The reversal of 13204645 is 54640231.

It is a cyclic number.

It is not a de Polignac number, because 13204645 - 2¹ = 13204643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22597 + ... + 23173.

It is an arithmetic number, because the mean of its divisors is an integer number (1040400).

Almost surely, 2^13204645 is an apocalyptic number.

It is an amenable number.

13204645 is a deficient number, since it is larger than the sum of its proper divisors (3441755).

13204645 is a wasteful number, since it uses less digits than its factorization.

13204645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 13204645 is about 3633.8196157762. The cubic root of 13204645 is about 236.3608682435.

Adding to 13204645 its reverse (54640231), we get a palindrome (67844876).

The spelling of 13204645 in words is "thirteen million, two hundred four thousand, six hundred forty-five".