20512027347265 has 32 divisors (see below), whose sum is σ = 25151879462400. Its totient is φ = 16055653447680.

The previous prime is 20512027347257. The next prime is 20512027347277. The reversal of 20512027347265 is 56274372021502.

It is a happy number.

It is not a de Polignac number, because 20512027347265 - 2³ = 20512027347257 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30796920 + ... + 31455910.

It is an arithmetic number, because the mean of its divisors is an integer number (785996233200).

Almost surely, 2^{20512027347265} is an apocalyptic number.

It is an amenable number.

20512027347265 is a deficient number, since it is larger than the sum of its proper divisors (4639852115135).

20512027347265 is a wasteful number, since it uses less digits than its factorization.

20512027347265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659817.

The product of its (nonzero) digits is 1411200, while the sum is 46.

Adding to 20512027347265 its reverse (56274372021502), we get a palindrome (76786399368767).

The spelling of 20512027347265 in words is "twenty trillion, five hundred twelve billion, twenty-seven million, three hundred forty-seven thousand, two hundred sixty-five".