20423212067 has 2 divisors, whose sum is σ = 20423212068. Its totient is φ = 20423212066.

The previous prime is 20423212063. The next prime is 20423212091. The reversal of 20423212067 is 76021232402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423212067 - 2² = 20423212063 is a prime.

It is a super-2 number, since 2×20423212067² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20423212063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211606033 + 10211606034.

It is an arithmetic number, because the mean of its divisors is an integer number (10211606034).

Almost surely, 2^20423212067 is an apocalyptic number.

20423212067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423212067 is an equidigital number, since it uses as much as digits as its factorization.

20423212067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 20423212067 its reverse (76021232402), we get a palindrome (96444444469).

The spelling of 20423212067 in words is "twenty billion, four hundred twenty-three million, two hundred twelve thousand, sixty-seven".