20323117184 has 32 divisors (see below), whose sum is σ = 40904881500. Its totient is φ = 10056794112.

The previous prime is 20323117163. The next prime is 20323117187. The reversal of 20323117184 is 48171132302.

It can be written as a sum of positive squares in 2 ways, for example, as 20143557184 + 179560000 = 141928^2 + 13400^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20323117184.

It is not an unprimeable number, because it can be changed into a prime (20323117187) 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, 806009 + ... + 830840.

Almost surely, 2^20323117184 is an apocalyptic number.

It is an amenable number.

20323117184 is an abundant number, since it is smaller than the sum of its proper divisors (20581764316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20323117184 is an equidigital number, since it uses as much as digits as its factorization.

20323117184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636960 (or 1636948 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 20323117184 its reverse (48171132302), we get a palindrome (68494249486).

The spelling of 20323117184 in words is "twenty billion, three hundred twenty-three million, one hundred seventeen thousand, one hundred eighty-four".