13020845 has 8 divisors (see below), whose sum is σ = 15716376. Its totient is φ = 10355776.

The previous prime is 13020809. The next prime is 13020853. The reversal of 13020845 is 54802031.

It can be written as a sum of positive squares in 4 ways, for example, as 7327849 + 5692996 = 2707^2 + 2386^2 .

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 13020845 - 2¹² = 13016749 is a prime.

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 13020845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6662 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (1964547).

Almost surely, 2^13020845 is an apocalyptic number.

It is an amenable number.

13020845 is a deficient number, since it is larger than the sum of its proper divisors (2695531).

13020845 is a wasteful number, since it uses less digits than its factorization.

13020845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15231.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13020845 is about 3608.4407990156. The cubic root of 13020845 is about 235.2590774843.

Adding to 13020845 its reverse (54802031), we get a palindrome (67822876).

The spelling of 13020845 in words is "thirteen million, twenty thousand, eight hundred forty-five".