21303000430305 has 64 divisors (see below), whose sum is σ = 37682629816320. Its totient is φ = 10190255961600.

The previous prime is 21303000430267. The next prime is 21303000430351. The reversal of 21303000430305 is 50303400030312.

It is a happy number.

It is not a de Polignac number, because 21303000430305 - 2⁷ = 21303000430177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16600654 + ... + 17837816.

It is an arithmetic number, because the mean of its divisors is an integer number (588791090880).

Almost surely, 2^{21303000430305} is an apocalyptic number.

It is an amenable number.

21303000430305 is a deficient number, since it is larger than the sum of its proper divisors (16379629386015).

21303000430305 is a wasteful number, since it uses less digits than its factorization.

21303000430305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238582.

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 21303000430305 its reverse (50303400030312), we get a palindrome (71606400460617).

The spelling of 21303000430305 in words is "twenty-one trillion, three hundred three billion, four hundred thirty thousand, three hundred five".