20786047 has 2 divisors, whose sum is σ = 20786048. Its totient is φ = 20786046.

The previous prime is 20786041. The next prime is 20786099. The reversal of 20786047 is 74068702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20786047 - 2¹¹ = 20783999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20786041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10393023 + 10393024.

It is an arithmetic number, because the mean of its divisors is an integer number (10393024).

Almost surely, 2^20786047 is an apocalyptic number.

20786047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20786047 is an equidigital number, since it uses as much as digits as its factorization.

20786047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20786047 is about 4559.1717449554. The cubic root of 20786047 is about 274.9522649928.

The spelling of 20786047 in words is "twenty million, seven hundred eighty-six thousand, forty-seven".