20000216947 has 2 divisors, whose sum is σ = 20000216948. Its totient is φ = 20000216946.

The previous prime is 20000216861. The next prime is 20000216983. The reversal of 20000216947 is 74961200002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20000216947 - 2¹⁵ = 20000184179 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000216347) 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, 10000108473 + 10000108474.

It is an arithmetic number, because the mean of its divisors is an integer number (10000108474).

Almost surely, 2^20000216947 is an apocalyptic number.

20000216947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000216947 is an equidigital number, since it uses as much as digits as its factorization.

20000216947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 20000216947 its reverse (74961200002), we get a palindrome (94961416949).

The spelling of 20000216947 in words is "twenty billion, two hundred sixteen thousand, nine hundred forty-seven".