21713316133 has 8 divisors (see below), whose sum is σ = 21799677816. Its totient is φ = 21627038400.

The previous prime is 21713316127. The next prime is 21713316161. The reversal of 21713316133 is 33161331712.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2898530244 + 18814785889 = 53838^2 + 137167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21713316133 - 2⁵ = 21713316101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21713316095 and 21713316104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21713311133) 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 7 ways as a sum of consecutive naturals, for example, 525363 + ... + 565183.

It is an arithmetic number, because the mean of its divisors is an integer number (2724959727).

Almost surely, 2^21713316133 is an apocalyptic number.

It is an amenable number.

21713316133 is a deficient number, since it is larger than the sum of its proper divisors (86361683).

21713316133 is a wasteful number, since it uses less digits than its factorization.

21713316133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41975.

The product of its digits is 6804, while the sum is 31.

Adding to 21713316133 its reverse (33161331712), we get a palindrome (54874647845).

The spelling of 21713316133 in words is "twenty-one billion, seven hundred thirteen million, three hundred sixteen thousand, one hundred thirty-three".