20220021667 has 2 divisors, whose sum is σ = 20220021668. Its totient is φ = 20220021666.

The previous prime is 20220021649. The next prime is 20220021713. The reversal of 20220021667 is 76612002202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20220021667 - 2¹¹ = 20220019619 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220021617) 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, 10110010833 + 10110010834.

It is an arithmetic number, because the mean of its divisors is an integer number (10110010834).

Almost surely, 2^20220021667 is an apocalyptic number.

20220021667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220021667 is an equidigital number, since it uses as much as digits as its factorization.

20220021667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 20220021667 its reverse (76612002202), we get a palindrome (96832023869).

The spelling of 20220021667 in words is "twenty billion, two hundred twenty million, twenty-one thousand, six hundred sixty-seven".