20560783 has 4 divisors (see below), whose sum is σ = 20584360. Its totient is φ = 20537208.

The previous prime is 20560703. The next prime is 20560807. The reversal of 20560783 is 38706502.

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

It is a cyclic number.

It is not a de Polignac number, because 20560783 - 2¹⁷ = 20429711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10428 + ... + 12241.

It is an arithmetic number, because the mean of its divisors is an integer number (5146090).

Almost surely, 2^20560783 is an apocalyptic number.

20560783 is a deficient number, since it is larger than the sum of its proper divisors (23577).

20560783 is an equidigital number, since it uses as much as digits as its factorization.

20560783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23576.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20560783 is about 4534.3999603035. The cubic root of 20560783 is about 273.9554112536.

The spelling of 20560783 in words is "twenty million, five hundred sixty thousand, seven hundred eighty-three".