20004311 has 2 divisors, whose sum is σ = 20004312. Its totient is φ = 20004310.

The previous prime is 20004307. The next prime is 20004323. The reversal of 20004311 is 11340002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20004311 - 2² = 20004307 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20004292 and 20004301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002155 + 10002156.

It is an arithmetic number, because the mean of its divisors is an integer number (10002156).

Almost surely, 2^20004311 is an apocalyptic number.

20004311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004311 is an equidigital number, since it uses as much as digits as its factorization.

20004311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20004311 is about 4472.6179134820. The cubic root of 20004311 is about 271.4612633489.

Adding to 20004311 its reverse (11340002), we get a palindrome (31344313).

The spelling of 20004311 in words is "twenty million, four thousand, three hundred eleven".