20104307 has 2 divisors, whose sum is σ = 20104308. Its totient is φ = 20104306.

The previous prime is 20104241. The next prime is 20104313. The reversal of 20104307 is 70340102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20104307 - 2¹⁶ = 20038771 is a prime.

It is not a weakly prime, because it can be changed into another prime (20104367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052153 + 10052154.

It is an arithmetic number, because the mean of its divisors is an integer number (10052154).

Almost surely, 2^20104307 is an apocalyptic number.

20104307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104307 is an equidigital number, since it uses as much as digits as its factorization.

20104307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20104307 is about 4483.7826664547. The cubic root of 20104307 is about 271.9128316051.

Adding to 20104307 its reverse (70340102), we get a palindrome (90444409).

The spelling of 20104307 in words is "twenty million, one hundred four thousand, three hundred seven".