21300030220 has 48 divisors (see below), whose sum is σ = 52308926208. Its totient is φ = 7133031360.

The previous prime is 21300030211. The next prime is 21300030223. The reversal of 21300030220 is 2203000312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21300030220.

It is not an unprimeable number, because it can be changed into a prime (21300030223) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1763086 + ... + 1775125.

It is an arithmetic number, because the mean of its divisors is an integer number (1089769296).

Almost surely, 2^21300030220 is an apocalyptic number.

21300030220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300030220 is an abundant number, since it is smaller than the sum of its proper divisors (31008895988).

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

21300030220 is a wasteful number, since it uses less digits than its factorization.

21300030220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538270 (or 3538268 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21300030220 its reverse (2203000312), we get a palindrome (23503030532).

The spelling of 21300030220 in words is "twenty-one billion, three hundred million, thirty thousand, two hundred twenty".