20331213163 has 2 divisors, whose sum is σ = 20331213164. Its totient is φ = 20331213162.

The previous prime is 20331213151. The next prime is 20331213247. The reversal of 20331213163 is 36131213302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20331213163 - 2⁹ = 20331212651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20331213103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165606581 + 10165606582.

It is an arithmetic number, because the mean of its divisors is an integer number (10165606582).

Almost surely, 2^20331213163 is an apocalyptic number.

20331213163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331213163 is an equidigital number, since it uses as much as digits as its factorization.

20331213163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20331213163 its reverse (36131213302), we get a palindrome (56462426465).

The spelling of 20331213163 in words is "twenty billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred sixty-three".