20568601 has 4 divisors (see below), whose sum is σ = 21462912. Its totient is φ = 19674292.

The previous prime is 20568571. The next prime is 20568617. The reversal of 20568601 is 10686502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10686502 = 2 ⋅5343251.

It is not a de Polignac number, because 20568601 - 2²¹ = 18471449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20568601.

It is not an unprimeable number, because it can be changed into a prime (20568631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447121 + ... + 447166.

It is an arithmetic number, because the mean of its divisors is an integer number (5365728).

Almost surely, 2^20568601 is an apocalyptic number.

It is an amenable number.

20568601 is a deficient number, since it is larger than the sum of its proper divisors (894311).

20568601 is an equidigital number, since it uses as much as digits as its factorization.

20568601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894310.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20568601 is about 4535.2619549481. The cubic root of 20568601 is about 273.9901296460.

The spelling of 20568601 in words is "twenty million, five hundred sixty-eight thousand, six hundred one".