20021105323 has 2 divisors, whose sum is σ = 20021105324. Its totient is φ = 20021105322.

The previous prime is 20021105311. The next prime is 20021105387. The reversal of 20021105323 is 32350112002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021105323 - 2⁹ = 20021104811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021105323.

It is not a weakly prime, because it can be changed into another prime (20021105723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010552661 + 10010552662.

It is an arithmetic number, because the mean of its divisors is an integer number (10010552662).

Almost surely, 2^20021105323 is an apocalyptic number.

20021105323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021105323 is an equidigital number, since it uses as much as digits as its factorization.

20021105323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20021105323 its reverse (32350112002), we get a palindrome (52371217325).

The spelling of 20021105323 in words is "twenty billion, twenty-one million, one hundred five thousand, three hundred twenty-three".