21303000430303 has 4 divisors (see below), whose sum is σ = 21426139161288. Its totient is φ = 21179861699320.

The previous prime is 21303000430267. The next prime is 21303000430351. The reversal of 21303000430303 is 30303400030312.

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-21303000430303 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 (21303000430003) 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, 61569365233 + ... + 61569365578.

It is an arithmetic number, because the mean of its divisors is an integer number (5356534790322).

Almost surely, 2^{21303000430303} is an apocalyptic number.

21303000430303 is a deficient number, since it is larger than the sum of its proper divisors (123138730985).

21303000430303 is a wasteful number, since it uses less digits than its factorization.

21303000430303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123138730984.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21303000430303 its reverse (30303400030312), we get a palindrome (51606400460615).

The spelling of 21303000430303 in words is "twenty-one trillion, three hundred three billion, four hundred thirty thousand, three hundred three".