20560571 has 2 divisors, whose sum is σ = 20560572. Its totient is φ = 20560570.

The previous prime is 20560537. The next prime is 20560583. The reversal of 20560571 is 17506502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20560571 - 2¹⁸ = 20298427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20560571.

It is not a weakly prime, because it can be changed into another prime (20560171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10280285 + 10280286.

It is an arithmetic number, because the mean of its divisors is an integer number (10280286).

Almost surely, 2^20560571 is an apocalyptic number.

20560571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20560571 is an equidigital number, since it uses as much as digits as its factorization.

20560571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20560571 is about 4534.3765833905. The cubic root of 20560571 is about 273.9544696755.

The spelling of 20560571 in words is "twenty million, five hundred sixty thousand, five hundred seventy-one".