20534425163 has 4 divisors (see below), whose sum is σ = 23467914480. Its totient is φ = 17600935848.

The previous prime is 20534425151. The next prime is 20534425187. The reversal of 20534425163 is 36152443502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20534425163 - 2¹⁶ = 20534359627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20534425133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466744648 + ... + 1466744661.

It is an arithmetic number, because the mean of its divisors is an integer number (5866978620).

Almost surely, 2^20534425163 is an apocalyptic number.

20534425163 is a deficient number, since it is larger than the sum of its proper divisors (2933489317).

20534425163 is an equidigital number, since it uses as much as digits as its factorization.

20534425163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933489316.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 20534425163 its reverse (36152443502), we get a palindrome (56686868665).

The spelling of 20534425163 in words is "twenty billion, five hundred thirty-four million, four hundred twenty-five thousand, one hundred sixty-three".