20641303 has 4 divisors (see below), whose sum is σ = 20841808. Its totient is φ = 20440800.

The previous prime is 20641297. The next prime is 20641307. The reversal of 20641303 is 30314602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20641303 - 2¹³ = 20633111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641307) 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, 100098 + ... + 100303.

It is an arithmetic number, because the mean of its divisors is an integer number (5210452).

Almost surely, 2^20641303 is an apocalyptic number.

20641303 is a deficient number, since it is larger than the sum of its proper divisors (200505).

20641303 is a wasteful number, since it uses less digits than its factorization.

20641303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200504.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20641303 is about 4543.2700778184. The cubic root of 20641303 is about 274.3125662085.

Adding to 20641303 its reverse (30314602), we get a palindrome (50955905).

The spelling of 20641303 in words is "twenty million, six hundred forty-one thousand, three hundred three".