20113013 has 2 divisors, whose sum is σ = 20113014. Its totient is φ = 20113012.

The previous prime is 20112997. The next prime is 20113019. The reversal of 20113013 is 31031102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 3775249 = 4042^2 + 1943^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113013 - 2⁴ = 20112997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112985 and 20113003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056506 + 10056507.

It is an arithmetic number, because the mean of its divisors is an integer number (10056507).

Almost surely, 2^20113013 is an apocalyptic number.

It is an amenable number.

20113013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113013 is an equidigital number, since it uses as much as digits as its factorization.

20113013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20113013 is about 4484.7533934432. The cubic root of 20113013 is about 271.9520757911.

Adding to 20113013 its reverse (31031102), we get a palindrome (51144115).

The spelling of 20113013 in words is "twenty million, one hundred thirteen thousand, thirteen".