21083269645 has 8 divisors (see below), whose sum is σ = 25314366456. Its totient is φ = 16856987136.

The previous prime is 21083269637. The next prime is 21083269667. The reversal of 21083269645 is 54696238012.

It can be written as a sum of positive squares in 4 ways, for example, as 258759396 + 20824510249 = 16086^2 + 144307^2 .

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 21083269645 - 2³ = 21083269637 is a prime.

It is a super-3 number, since 3×21083269645³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21083269595 and 21083269604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193932 + ... + 1211461.

It is an arithmetic number, because the mean of its divisors is an integer number (3164295807).

Almost surely, 2^21083269645 is an apocalyptic number.

It is an amenable number.

21083269645 is a deficient number, since it is larger than the sum of its proper divisors (4231096811).

21083269645 is a wasteful number, since it uses less digits than its factorization.

21083269645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407151.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 21083269645 in words is "twenty-one billion, eighty-three million, two hundred sixty-nine thousand, six hundred forty-five".