21303303030 has 48 divisors (see below), whose sum is σ = 55906263504. Its totient is φ = 5627785920.

The previous prime is 21303303011. The next prime is 21303303031. The reversal of 21303303030 is 3030330312.

21303303030 is a `hidden beast` number, since 2 + 1 + 30 + 330 + 303 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21303302994 and 21303303012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303303031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1096461 + ... + 1115720.

It is an arithmetic number, because the mean of its divisors is an integer number (1164713823).

Almost surely, 2^21303303030 is an apocalyptic number.

21303303030 is an abundant number, since it is smaller than the sum of its proper divisors (34602960474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21303303030 is a wasteful number, since it uses less digits than its factorization.

21303303030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212301 (or 2212298 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

Adding to 21303303030 its reverse (3030330312), we get a palindrome (24333633342).

The spelling of 21303303030 in words is "twenty-one billion, three hundred three million, three hundred three thousand, thirty".