20560445 has 4 divisors (see below), whose sum is σ = 24672540. Its totient is φ = 16448352.

The previous prime is 20560427. The next prime is 20560487. The reversal of 20560445 is 54406502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2353156 + 18207289 = 1534^2 + 4267^2 .

It is a cyclic number.

It is not a de Polignac number, because 20560445 - 2⁶ = 20560381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056040 + ... + 2056049.

It is an arithmetic number, because the mean of its divisors is an integer number (6168135).

Almost surely, 2^20560445 is an apocalyptic number.

It is an amenable number.

20560445 is a deficient number, since it is larger than the sum of its proper divisors (4112095).

20560445 is an equidigital number, since it uses as much as digits as its factorization.

20560445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112094.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 20560445 is about 4534.3626895078. The cubic root of 20560445 is about 273.9539100553.

Adding to 20560445 its reverse (54406502), we get a palindrome (74966947).

The spelling of 20560445 in words is "twenty million, five hundred sixty thousand, four hundred forty-five".