20346502222021 has 2 divisors, whose sum is σ = 20346502222022. Its totient is φ = 20346502222020.

The previous prime is 20346502222009. The next prime is 20346502222063. The reversal of 20346502222021 is 12022220564302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11026218330625 + 9320283891396 = 3320575^2 + 3052914^2 .

It is a cyclic number.

It is not a de Polignac number, because 20346502222021 - 2²¹ = 20346500124869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20346502222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173251111010 + 10173251111011.

It is an arithmetic number, because the mean of its divisors is an integer number (10173251111011).

Almost surely, 2^{20346502222021} is an apocalyptic number.

It is an amenable number.

20346502222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20346502222021 is an equidigital number, since it uses as much as digits as its factorization.

20346502222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20346502222021 its reverse (12022220564302), we get a palindrome (32368722786323).

The spelling of 20346502222021 in words is "twenty trillion, three hundred forty-six billion, five hundred two million, two hundred twenty-two thousand, twenty-one".