20216827 has 2 divisors, whose sum is σ = 20216828. Its totient is φ = 20216826.

The previous prime is 20216761. The next prime is 20216851. The reversal of 20216827 is 72861202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20216827 - 2⁷ = 20216699 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20216795 and 20216804.

It is not a weakly prime, because it can be changed into another prime (20246827) 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, 10108413 + 10108414.

It is an arithmetic number, because the mean of its divisors is an integer number (10108414).

Almost surely, 2^20216827 is an apocalyptic number.

20216827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216827 is an equidigital number, since it uses as much as digits as its factorization.

20216827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20216827 is about 4496.3126003426. The cubic root of 20216827 is about 272.4191696967.

The spelling of 20216827 in words is "twenty million, two hundred sixteen thousand, eight hundred twenty-seven".