21302352041 has 4 divisors (see below), whose sum is σ = 21336766800. Its totient is φ = 21267937284.

The previous prime is 21302352023. The next prime is 21302352053. The reversal of 21302352041 is 14025320312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21302352041 - 2¹⁴ = 21302335657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302351998 and 21302352016.

It is not an unprimeable number, because it can be changed into a prime (21302352011) 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, 17206451 + ... + 17207688.

It is an arithmetic number, because the mean of its divisors is an integer number (5334191700).

Almost surely, 2^21302352041 is an apocalyptic number.

It is an amenable number.

21302352041 is a deficient number, since it is larger than the sum of its proper divisors (34414759).

21302352041 is an equidigital number, since it uses as much as digits as its factorization.

21302352041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34414758.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21302352041 its reverse (14025320312), we get a palindrome (35327672353).

The spelling of 21302352041 in words is "twenty-one billion, three hundred two million, three hundred fifty-two thousand, forty-one".