20004101 has 4 divisors (see below), whose sum is σ = 21542892. Its totient is φ = 18465312.

The previous prime is 20004071. The next prime is 20004107. The reversal of 20004101 is 10140002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4519876 + 15484225 = 2126^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004101 - 2¹⁸ = 19741957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769376 + ... + 769401.

It is an arithmetic number, because the mean of its divisors is an integer number (5385723).

Almost surely, 2^20004101 is an apocalyptic number.

It is an amenable number.

20004101 is a deficient number, since it is larger than the sum of its proper divisors (1538791).

20004101 is a wasteful number, since it uses less digits than its factorization.

20004101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538790.

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

The square root of 20004101 is about 4472.5944372366. The cubic root of 20004101 is about 271.4603134359.

Adding to 20004101 its reverse (10140002), we get a palindrome (30144103).

The spelling of 20004101 in words is "twenty million, four thousand, one hundred one".