21303030300 has 72 divisors (see below), whose sum is σ = 61977460272. Its totient is φ = 5649408000.

The previous prime is 21303030289. The next prime is 21303030313. The reversal of 21303030300 is 303030312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21303030300.

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 23 ways as a sum of consecutive naturals, for example, 141861 + ... + 250460.

Almost surely, 2^21303030300 is an apocalyptic number.

21303030300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303030300 is an abundant number, since it is smaller than the sum of its proper divisors (40674429972).

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

21303030300 is a wasteful number, since it uses less digits than its factorization.

21303030300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392519 (or 392512 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 15.

Adding to 21303030300 its reverse (303030312), we get a palindrome (21606060612).

The spelling of 21303030300 in words is "twenty-one billion, three hundred three million, thirty thousand, three hundred".