20041213 has 2 divisors, whose sum is σ = 20041214. Its totient is φ = 20041212.

The previous prime is 20041199. The next prime is 20041237. The reversal of 20041213 is 31214002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19909444 + 131769 = 4462^2 + 363^2 .

It is a cyclic number.

It is not a de Polignac number, because 20041213 - 2⁹ = 20040701 is a prime.

It is a super-2 number, since 2×20041213² = 803300437022738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20041193 and 20041202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20041243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020606 + 10020607.

It is an arithmetic number, because the mean of its divisors is an integer number (10020607).

Almost surely, 2^20041213 is an apocalyptic number.

It is an amenable number.

20041213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041213 is an equidigital number, since it uses as much as digits as its factorization.

20041213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20041213 is about 4476.7413371782. The cubic root of 20041213 is about 271.6280825594.

Adding to 20041213 its reverse (31214002), we get a palindrome (51255215).

The spelling of 20041213 in words is "twenty million, forty-one thousand, two hundred thirteen".