20346665402213 has 2 divisors, whose sum is σ = 20346665402214. Its totient is φ = 20346665402212.

The previous prime is 20346665402149. The next prime is 20346665402263. The reversal of 20346665402213 is 31220456664302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17341078004644 + 3005587397569 = 4164262^2 + 1733663^2 .

It is a cyclic number.

It is not a de Polignac number, because 20346665402213 - 2⁶ = 20346665402149 is a prime.

It is a super-2 number, since 2×20346665402213² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20346665402263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173332701106 + 10173332701107.

It is an arithmetic number, because the mean of its divisors is an integer number (10173332701107).

Almost surely, 2^{20346665402213} is an apocalyptic number.

It is an amenable number.

20346665402213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20346665402213 is an equidigital number, since it uses as much as digits as its factorization.

20346665402213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 20346665402213 in words is "twenty trillion, three hundred forty-six billion, six hundred sixty-five million, four hundred two thousand, two hundred thirteen".