20063605 has 4 divisors (see below), whose sum is σ = 24076332. Its totient is φ = 16050880.

The previous prime is 20063591. The next prime is 20063611. The reversal of 20063605 is 50636002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50636002 = 2 ⋅25318001.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 17380561 = 1638^2 + 4169^2 .

It is not a de Polignac number, because 20063605 - 2²³ = 11674997 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006356 + ... + 2006365.

It is an arithmetic number, because the mean of its divisors is an integer number (6019083).

Almost surely, 2^20063605 is an apocalyptic number.

It is an amenable number.

20063605 is a deficient number, since it is larger than the sum of its proper divisors (4012727).

20063605 is an equidigital number, since it uses as much as digits as its factorization.

20063605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012726.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20063605 is about 4479.2415652653. The cubic root of 20063605 is about 271.7292080449.

Adding to 20063605 its reverse (50636002), we get a palindrome (70699607).

The spelling of 20063605 in words is "twenty million, sixty-three thousand, six hundred five".