21303210323030 has 16 divisors (see below), whose sum is σ = 38638494450864. Its totient is φ = 8456236158240.

The previous prime is 21303210323027. The next prime is 21303210323053. The reversal of 21303210323030 is 3032301230312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21303210322987 and 21303210323005.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8130994997 + ... + 8130997616.

It is an arithmetic number, because the mean of its divisors is an integer number (2414905903179).

Almost surely, 2^{21303210323030} is an apocalyptic number.

21303210323030 is a deficient number, since it is larger than the sum of its proper divisors (17335284127834).

21303210323030 is a wasteful number, since it uses less digits than its factorization.

21303210323030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16261992751.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21303210323030 its reverse (3032301230312), we get a palindrome (24335511553342).

The spelling of 21303210323030 in words is "twenty-one trillion, three hundred three billion, two hundred ten million, three hundred twenty-three thousand, thirty".