20560845 has 8 divisors (see below), whose sum is σ = 32897376. Its totient is φ = 10965776.

The previous prime is 20560829. The next prime is 20560847. The reversal of 20560845 is 54806502.

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 20560845 - 2⁴ = 20560829 is a prime.

It is a super-2 number, since 2×20560845² = 845496694228050, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560847) 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, 685347 + ... + 685376.

It is an arithmetic number, because the mean of its divisors is an integer number (4112172).

Almost surely, 2^20560845 is an apocalyptic number.

It is an amenable number.

20560845 is a deficient number, since it is larger than the sum of its proper divisors (12336531).

20560845 is a wasteful number, since it uses less digits than its factorization.

20560845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370731.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20560845 is about 4534.4067969250. The cubic root of 20560845 is about 273.9556866195.

The spelling of 20560845 in words is "twenty million, five hundred sixty thousand, eight hundred forty-five".