20104013 has 12 divisors (see below), whose sum is σ = 21747348. Its totient is φ = 18520320.

The previous prime is 20104003. The next prime is 20104031. The reversal of 20104013 is 31040102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6724 + 20097289 = 82^2 + 4483^2 .

It is not a de Polignac number, because 20104013 - 2¹⁸ = 19841869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103985 and 20104003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47543 + ... + 47963.

It is an arithmetic number, because the mean of its divisors is an integer number (1812279).

Almost surely, 2^20104013 is an apocalyptic number.

It is an amenable number.

20104013 is a deficient number, since it is larger than the sum of its proper divisors (1643335).

20104013 is an equidigital number, since it uses as much as digits as its factorization.

20104013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20104013 is about 4483.7498815166. The cubic root of 20104013 is about 271.9115061386.

Adding to 20104013 its reverse (31040102), we get a palindrome (51144115).

The spelling of 20104013 in words is "twenty million, one hundred four thousand, thirteen".