21440512040303 has 4 divisors (see below), whose sum is σ = 21549347127000. Its totient is φ = 21331676953608.

The previous prime is 21440512040237. The next prime is 21440512040309. The reversal of 21440512040303 is 30304021504412.

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

It is a cyclic number.

It is not a de Polignac number, because 21440512040303 - 2³⁴ = 21423332171119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440512040309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54417543053 + ... + 54417543446.

It is an arithmetic number, because the mean of its divisors is an integer number (5387336781750).

Almost surely, 2^{21440512040303} is an apocalyptic number.

21440512040303 is a deficient number, since it is larger than the sum of its proper divisors (108835086697).

21440512040303 is a wasteful number, since it uses less digits than its factorization.

21440512040303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108835086696.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21440512040303 its reverse (30304021504412), we get a palindrome (51744533544715).

The spelling of 21440512040303 in words is "twenty-one trillion, four hundred forty billion, five hundred twelve million, forty thousand, three hundred three".