20104305 has 16 divisors (see below), whose sum is σ = 34641600. Its totient is φ = 9897408.

The previous prime is 20104241. The next prime is 20104307. The reversal of 20104305 is 50340102.

It is not a de Polignac number, because 20104305 - 2⁶ = 20104241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20104307) 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 15 ways as a sum of consecutive naturals, for example, 51355 + ... + 51744.

It is an arithmetic number, because the mean of its divisors is an integer number (2165100).

Almost surely, 2^20104305 is an apocalyptic number.

It is an amenable number.

20104305 is a deficient number, since it is larger than the sum of its proper divisors (14537295).

20104305 is a wasteful number, since it uses less digits than its factorization.

20104305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103120.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20104305 is about 4483.7824434288. The cubic root of 20104305 is about 271.9128225884.

Adding to 20104305 its reverse (50340102), we get a palindrome (70444407).

The spelling of 20104305 in words is "twenty million, one hundred four thousand, three hundred five".