20516525273 has 2 divisors, whose sum is σ = 20516525274.
Its totient is φ = 20516525272.
The previous prime is 20516525231. The next prime is 20516525329. The reversal of 20516525273 is 37252561502.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 19960886089 + 555639184 = 141283^2 + 23572^2
It is a cyclic number.
It is not a de Polignac number, because 20516525273 - 218 = 20516263129 is a prime.
It is not a weakly prime, because it can be changed into another prime (20516525473) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10258262636 + 10258262637.
It is an arithmetic number, because the mean of its divisors is an integer number (10258262637).
Almost surely, 220516525273 is an apocalyptic number.
It is an amenable number.
20516525273 is a deficient number, since it is larger than the sum of its proper divisors (1).
20516525273 is an equidigital number, since it uses as much as digits as its factorization.
20516525273 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 126000, while the sum is 38.
The spelling of 20516525273 in words is "twenty billion, five hundred sixteen million, five hundred twenty-five thousand, two hundred seventy-three".