20512245526163 has 16 divisors (see below), whose sum is σ = 21586080324960. Its totient is φ = 19465707744000.

The previous prime is 20512245526139. The next prime is 20512245526183. The reversal of 20512245526163 is 36162554221502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20512245526163 - 2⁸ = 20512245525907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20512245526133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25157693 + ... + 25960238.

It is an arithmetic number, because the mean of its divisors is an integer number (1349130020310).

Almost surely, 2^{20512245526163} is an apocalyptic number.

20512245526163 is a deficient number, since it is larger than the sum of its proper divisors (1073834798797).

20512245526163 is a wasteful number, since it uses less digits than its factorization.

20512245526163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51118198.

The product of its (nonzero) digits is 864000, while the sum is 44.

Adding to 20512245526163 its reverse (36162554221502), we get a palindrome (56674799747665).

The spelling of 20512245526163 in words is "twenty trillion, five hundred twelve billion, two hundred forty-five million, five hundred twenty-six thousand, one hundred sixty-three".