20321220067 has 2 divisors, whose sum is σ = 20321220068. Its totient is φ = 20321220066.

The previous prime is 20321220053. The next prime is 20321220071. The reversal of 20321220067 is 76002212302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20321220067 - 2¹¹ = 20321218019 is a prime.

It is a super-2 number, since 2×20321220067² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20321220077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160610033 + 10160610034.

It is an arithmetic number, because the mean of its divisors is an integer number (10160610034).

Almost surely, 2^20321220067 is an apocalyptic number.

20321220067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321220067 is an equidigital number, since it uses as much as digits as its factorization.

20321220067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20321220067 its reverse (76002212302), we get a palindrome (96323432369).

The spelling of 20321220067 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand, sixty-seven".