20104111 has 4 divisors (see below), whose sum is σ = 20116152. Its totient is φ = 20092072.

The previous prime is 20104067. The next prime is 20104129. The reversal of 20104111 is 11140102.

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 20104111 - 2⁹ = 20103599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104141) 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, 3016 + ... + 7021.

It is an arithmetic number, because the mean of its divisors is an integer number (5029038).

Almost surely, 2^20104111 is an apocalyptic number.

20104111 is a deficient number, since it is larger than the sum of its proper divisors (12041).

20104111 is a wasteful number, since it uses less digits than its factorization.

20104111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12040.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 20104111 is about 4483.7608098559. The cubic root of 20104111 is about 271.9119479622.

Adding to 20104111 its reverse (11140102), we get a palindrome (31244213).

The spelling of 20104111 in words is "twenty million, one hundred four thousand, one hundred eleven".