20466847 has 2 divisors, whose sum is σ = 20466848. Its totient is φ = 20466846.

The previous prime is 20466773. The next prime is 20466863. The reversal of 20466847 is 74866402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20466847 - 2¹⁵ = 20434079 is a prime.

It is a super-2 number, since 2×20466847² = 837783652242818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20466877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233423 + 10233424.

It is an arithmetic number, because the mean of its divisors is an integer number (10233424).

Almost surely, 2^20466847 is an apocalyptic number.

20466847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466847 is an equidigital number, since it uses as much as digits as its factorization.

20466847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 20466847 is about 4524.0299512713. The cubic root of 20466847 is about 273.5375677957.

The spelling of 20466847 in words is "twenty million, four hundred sixty-six thousand, eight hundred forty-seven".