20216347 has 2 divisors, whose sum is σ = 20216348. Its totient is φ = 20216346.

The previous prime is 20216341. The next prime is 20216353. The reversal of 20216347 is 74361202.

It is a balanced prime because it is at equal distance from previous prime (20216341) and next prime (20216353).

It is a cyclic number.

It is not a de Polignac number, because 20216347 - 2¹⁹ = 19692059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20216341) 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, 10108173 + 10108174.

It is an arithmetic number, because the mean of its divisors is an integer number (10108174).

Almost surely, 2^20216347 is an apocalyptic number.

20216347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216347 is an equidigital number, since it uses as much as digits as its factorization.

20216347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20216347 is about 4496.2592229541. The cubic root of 20216347 is about 272.4170137000.

Adding to 20216347 its reverse (74361202), we get a palindrome (94577549).

The spelling of 20216347 in words is "twenty million, two hundred sixteen thousand, three hundred forty-seven".