21302304020443 has 4 divisors (see below), whose sum is σ = 21302368514280. Its totient is φ = 21302239526608.

The previous prime is 21302304020401. The next prime is 21302304020507. The reversal of 21302304020443 is 34402040320312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21302304020443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302304029443) 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, 31748905 + ... + 32412922.

It is an arithmetic number, because the mean of its divisors is an integer number (5325592128570).

Almost surely, 2^{21302304020443} is an apocalyptic number.

21302304020443 is a deficient number, since it is larger than the sum of its proper divisors (64493837).

21302304020443 is an equidigital number, since it uses as much as digits as its factorization.

21302304020443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64493836.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21302304020443 its reverse (34402040320312), we get a palindrome (55704344340755).

The spelling of 21302304020443 in words is "twenty-one trillion, three hundred two billion, three hundred four million, twenty thousand, four hundred forty-three".