20203013 has 4 divisors (see below), whose sum is σ = 20244000. Its totient is φ = 20162028.

The previous prime is 20203003. The next prime is 20203049. The reversal of 20203013 is 31030202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20203013 - 2¹² = 20198917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202985 and 20203003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203003) 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, 19745 + ... + 20742.

It is an arithmetic number, because the mean of its divisors is an integer number (5061000).

Almost surely, 2^20203013 is an apocalyptic number.

It is an amenable number.

20203013 is a deficient number, since it is larger than the sum of its proper divisors (40987).

20203013 is an equidigital number, since it uses as much as digits as its factorization.

20203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40986.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20203013 is about 4494.7761902012. The cubic root of 20203013 is about 272.3571082621.

Adding to 20203013 its reverse (31030202), we get a palindrome (51233215).

The spelling of 20203013 in words is "twenty million, two hundred three thousand, thirteen".