20050013 has 2 divisors, whose sum is σ = 20050014. Its totient is φ = 20050012.

The previous prime is 20050003. The next prime is 20050027. The reversal of 20050013 is 31005002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17656804 + 2393209 = 4202^2 + 1547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20050013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20049976 and 20050003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20050003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025006 + 10025007.

It is an arithmetic number, because the mean of its divisors is an integer number (10025007).

Almost surely, 2^20050013 is an apocalyptic number.

It is an amenable number.

20050013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050013 is an equidigital number, since it uses as much as digits as its factorization.

20050013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 20050013 is about 4477.7240870782. The cubic root of 20050013 is about 271.6678336022.

Adding to 20050013 its reverse (31005002), we get a palindrome (51055015).

The spelling of 20050013 in words is "twenty million, fifty thousand, thirteen".