20001303 has 32 divisors (see below), whose sum is σ = 34245120. Its totient is φ = 11301120.

The previous prime is 20001301. The next prime is 20001307. The reversal of 20001303 is 30310002.

It is a happy number.

It is not a de Polignac number, because 20001303 - 2¹ = 20001301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17788 + ... + 18878.

It is an arithmetic number, because the mean of its divisors is an integer number (1070160).

Almost surely, 2^20001303 is an apocalyptic number.

20001303 is a deficient number, since it is larger than the sum of its proper divisors (14243817).

20001303 is a wasteful number, since it uses less digits than its factorization.

20001303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 20001303 is about 4472.2816324556. The cubic root of 20001303 is about 271.4476563417.

Adding to 20001303 its reverse (30310002), we get a palindrome (50311305).

The spelling of 20001303 in words is "twenty million, one thousand, three hundred three".