20563713 has 20 divisors (see below), whose sum is σ = 30976000. Its totient is φ = 13594392.

The previous prime is 20563691. The next prime is 20563729. The reversal of 20563713 is 31736502.

It is a happy number.

20563713 is a `hidden beast` number, since 20 + 5 + 637 + 1 + 3 = 666.

It is not a de Polignac number, because 20563713 - 2⁸ = 20563457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20563733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9288 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (1548800).

Almost surely, 2^20563713 is an apocalyptic number.

It is an amenable number.

20563713 is a deficient number, since it is larger than the sum of its proper divisors (10412287).

20563713 is a wasteful number, since it uses less digits than its factorization.

20563713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20563713 is about 4534.7230345414. The cubic root of 20563713 is about 273.9684239102.

The spelling of 20563713 in words is "twenty million, five hundred sixty-three thousand, seven hundred thirteen".