20004851 has 2 divisors, whose sum is σ = 20004852. Its totient is φ = 20004850.

The previous prime is 20004833. The next prime is 20004883. The reversal of 20004851 is 15840002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20004851 - 2¹⁴ = 19988467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20004811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002425 + 10002426.

It is an arithmetic number, because the mean of its divisors is an integer number (10002426).

Almost surely, 2^20004851 is an apocalyptic number.

20004851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004851 is an equidigital number, since it uses as much as digits as its factorization.

20004851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20004851 is about 4472.6782804043. The cubic root of 20004851 is about 271.4637059518.

Adding to 20004851 its reverse (15840002), we get a palindrome (35844853).

The spelling of 20004851 in words is "twenty million, four thousand, eight hundred fifty-one".