20982475163 has 4 divisors (see below), whose sum is σ = 22596511728. Its totient is φ = 19368438600.

The previous prime is 20982475159. The next prime is 20982475187. The reversal of 20982475163 is 36157428902.

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 20982475163 - 2² = 20982475159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20982475133) 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, 807018263 + ... + 807018288.

It is an arithmetic number, because the mean of its divisors is an integer number (5649127932).

It is a 1-persistent number, because it is pandigital, but 2⋅20982475163 = 41964950326 is not.

Almost surely, 2^20982475163 is an apocalyptic number.

20982475163 is a deficient number, since it is larger than the sum of its proper divisors (1614036565).

20982475163 is a wasteful number, since it uses less digits than its factorization.

20982475163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614036564.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20982475163 in words is "twenty billion, nine hundred eighty-two million, four hundred seventy-five thousand, one hundred sixty-three".