21359079184 has 10 divisors (see below), whose sum is σ = 41383215950. Its totient is φ = 10679539584.

The previous prime is 21359079163. The next prime is 21359079187. The reversal of 21359079184 is 48197095312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18714240000 + 2644839184 = 136800^2 + 51428^2 .

It is not an unprimeable number, because it can be changed into a prime (21359079187) 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 as a sum of consecutive naturals, namely, 667471209 + ... + 667471240.

It is an arithmetic number, because the mean of its divisors is an integer number (4138321595).

Almost surely, 2^21359079184 is an apocalyptic number.

It is an amenable number.

21359079184 is a deficient number, since it is larger than the sum of its proper divisors (20024136766).

21359079184 is a wasteful number, since it uses less digits than its factorization.

21359079184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334942457 (or 1334942451 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 21359079184 in words is "twenty-one billion, three hundred fifty-nine million, seventy-nine thousand, one hundred eighty-four".