20021128163 has 2 divisors, whose sum is σ = 20021128164. Its totient is φ = 20021128162.

The previous prime is 20021128097. The next prime is 20021128187. The reversal of 20021128163 is 36182112002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021128163 - 2¹⁶ = 20021062627 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021128363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010564081 + 10010564082.

It is an arithmetic number, because the mean of its divisors is an integer number (10010564082).

Almost surely, 2^20021128163 is an apocalyptic number.

20021128163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021128163 is an equidigital number, since it uses as much as digits as its factorization.

20021128163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 20021128163 in words is "twenty billion, twenty-one million, one hundred twenty-eight thousand, one hundred sixty-three".