20104211 has 4 divisors (see below), whose sum is σ = 20145000. Its totient is φ = 20063424.

The previous prime is 20104207. The next prime is 20104229. The reversal of 20104211 is 11240102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20104211 - 2² = 20104207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20104192 and 20104201.

It is not an unprimeable number, because it can be changed into a prime (20104241) 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, 19646 + ... + 20643.

It is an arithmetic number, because the mean of its divisors is an integer number (5036250).

Almost surely, 2^20104211 is an apocalyptic number.

20104211 is a deficient number, since it is larger than the sum of its proper divisors (40789).

20104211 is an equidigital number, since it uses as much as digits as its factorization.

20104211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40788.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20104211 is about 4483.7719611952. The cubic root of 20104211 is about 271.9123988011.

Adding to 20104211 its reverse (11240102), we get a palindrome (31344313).

The spelling of 20104211 in words is "twenty million, one hundred four thousand, two hundred eleven".