20006847 has 24 divisors (see below), whose sum is σ = 33706400. Its totient is φ = 11430720.

The previous prime is 20006843. The next prime is 20006851. The reversal of 20006847 is 74860002.

It is an interprime number because it is at equal distance from previous prime (20006843) and next prime (20006851).

It is not a de Polignac number, because 20006847 - 2² = 20006843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20006847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154 + ... + 6327.

Almost surely, 2^20006847 is an apocalyptic number.

20006847 is a deficient number, since it is larger than the sum of its proper divisors (13699553).

20006847 is an equidigital number, since it uses as much as digits as its factorization.

20006847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20006847 is about 4472.9014073641. The cubic root of 20006847 is about 271.4727341543.

Adding to 20006847 its reverse (74860002), we get a palindrome (94866849).

The spelling of 20006847 in words is "twenty million, six thousand, eight hundred forty-seven".