20002303 has 4 divisors (see below), whose sum is σ = 20029968. Its totient is φ = 19974640.

The previous prime is 20002261. The next prime is 20002313. The reversal of 20002303 is 30320002.

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 20002303 - 2¹⁷ = 19871231 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 20002303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002313) 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, 12718 + ... + 14203.

It is an arithmetic number, because the mean of its divisors is an integer number (5007492).

Almost surely, 2^20002303 is an apocalyptic number.

20002303 is a deficient number, since it is larger than the sum of its proper divisors (27665).

20002303 is an equidigital number, since it uses as much as digits as its factorization.

20002303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27664.

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 20002303 is about 4472.3934308153. The cubic root of 20002303 is about 271.4521800992.

Adding to 20002303 its reverse (30320002), we get a palindrome (50322305).

It can be divided in two parts, 20002 and 303, that multiplied together give a palindrome (6060606).

The spelling of 20002303 in words is "twenty million, two thousand, three hundred three".