21303320210 has 16 divisors (see below), whose sum is σ = 38353176000. Its totient is φ = 8519728176.

The previous prime is 21303320189. The next prime is 21303320243. The reversal of 21303320210 is 1202330312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143300 + ... + 251279.

It is an arithmetic number, because the mean of its divisors is an integer number (2397073500).

Almost surely, 2^21303320210 is an apocalyptic number.

21303320210 is a deficient number, since it is larger than the sum of its proper divisors (17049855790).

21303320210 is a wasteful number, since it uses less digits than its factorization.

21303320210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399985.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21303320210 its reverse (1202330312), we get a palindrome (22505650522).

The spelling of 21303320210 in words is "twenty-one billion, three hundred three million, three hundred twenty thousand, two hundred ten".