20568473 has 4 divisors (see below), whose sum is σ = 20578740. Its totient is φ = 20558208.

The previous prime is 20568461. The next prime is 20568497. The reversal of 20568473 is 37486502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15429184 + 5139289 = 3928^2 + 2267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20568473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20568073) 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, 1040 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (5144685).

Almost surely, 2^20568473 is an apocalyptic number.

It is an amenable number.

20568473 is a deficient number, since it is larger than the sum of its proper divisors (10267).

20568473 is an equidigital number, since it uses as much as digits as its factorization.

20568473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20568473 is about 4535.2478432827. The cubic root of 20568473 is about 273.9895612909.

The spelling of 20568473 in words is "twenty million, five hundred sixty-eight thousand, four hundred seventy-three".