20346502213321 has 2 divisors, whose sum is σ = 20346502213322. Its totient is φ = 20346502213320.

The previous prime is 20346502213309. The next prime is 20346502213357. The reversal of 20346502213321 is 12331220564302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15750778125625 + 4595724087696 = 3968725^2 + 2143764^2 .

It is a cyclic number.

It is not a de Polignac number, because 20346502213321 - 2⁹ = 20346502212809 is a prime.

It is not a weakly prime, because it can be changed into another prime (20346502213361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173251106660 + 10173251106661.

It is an arithmetic number, because the mean of its divisors is an integer number (10173251106661).

Almost surely, 2^{20346502213321} is an apocalyptic number.

It is an amenable number.

20346502213321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20346502213321 is an equidigital number, since it uses as much as digits as its factorization.

20346502213321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 20346502213321 its reverse (12331220564302), we get a palindrome (32677722777623).

The spelling of 20346502213321 in words is "twenty trillion, three hundred forty-six billion, five hundred two million, two hundred thirteen thousand, three hundred twenty-one".