21303220030 has 32 divisors (see below), whose sum is σ = 40921168896. Its totient is φ = 7956877824.

The previous prime is 21303220021. The next prime is 21303220061. The reversal of 21303220030 is 3002230312.

It is a junction number, because it is equal to n+sod(n) for n = 21303219986 and 21303220013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471769 + ... + 514948.

It is an arithmetic number, because the mean of its divisors is an integer number (1278786528).

Almost surely, 2^21303220030 is an apocalyptic number.

21303220030 is a deficient number, since it is larger than the sum of its proper divisors (19617948866).

21303220030 is a wasteful number, since it uses less digits than its factorization.

21303220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986868.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21303220030 its reverse (3002230312), we get a palindrome (24305450342).

The spelling of 21303220030 in words is "twenty-one billion, three hundred three million, two hundred twenty thousand, thirty".