20502200087321 has 2 divisors, whose sum is σ = 20502200087322. Its totient is φ = 20502200087320.

The previous prime is 20502200087293. The next prime is 20502200087351. The reversal of 20502200087321 is 12378000220502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20478693064921 + 23507022400 = 4525339^2 + 153320^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502200087321 - 2¹⁰ = 20502200086297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502200087351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251100043660 + 10251100043661.

It is an arithmetic number, because the mean of its divisors is an integer number (10251100043661).

Almost surely, 2^{20502200087321} is an apocalyptic number.

It is an amenable number.

20502200087321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502200087321 is an equidigital number, since it uses as much as digits as its factorization.

20502200087321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 20502200087321 in words is "twenty trillion, five hundred two billion, two hundred million, eighty-seven thousand, three hundred twenty-one".