20011303 has 4 divisors (see below), whose sum is σ = 21550648. Its totient is φ = 18471960.

The previous prime is 20011301. The next prime is 20011309. The reversal of 20011303 is 30311002.

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

It is not a de Polignac number, because 20011303 - 2¹ = 20011301 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 20011303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011301) 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, 769653 + ... + 769678.

It is an arithmetic number, because the mean of its divisors is an integer number (5387662).

Almost surely, 2^20011303 is an apocalyptic number.

20011303 is a deficient number, since it is larger than the sum of its proper divisors (1539345).

20011303 is a wasteful number, since it uses less digits than its factorization.

20011303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539344.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20011303 is about 4473.3994903205. The cubic root of 20011303 is about 271.4928871334.

Adding to 20011303 its reverse (30311002), we get a palindrome (50322305).

The spelling of 20011303 in words is "twenty million, eleven thousand, three hundred three".