20159157163 has 4 divisors (see below), whose sum is σ = 20162144728. Its totient is φ = 20156169600.

The previous prime is 20159157143. The next prime is 20159157191. The reversal of 20159157163 is 36175195102.

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 20159157163 - 2⁵ = 20159157131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20159157143) 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 in 3 ways as a sum of consecutive naturals, for example, 1483638 + ... + 1497163.

It is an arithmetic number, because the mean of its divisors is an integer number (5040536182).

Almost surely, 2^20159157163 is an apocalyptic number.

20159157163 is a deficient number, since it is larger than the sum of its proper divisors (2987565).

20159157163 is an equidigital number, since it uses as much as digits as its factorization.

20159157163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987564.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 20159157163 in words is "twenty billion, one hundred fifty-nine million, one hundred fifty-seven thousand, one hundred sixty-three".