21300323220 has 96 divisors (see below), whose sum is σ = 72292026240. Its totient is φ = 5163713280.

The previous prime is 21300323203. The next prime is 21300323251. The reversal of 21300323220 is 2232300312.

It is a happy number.

21300323220 is a `hidden beast` number, since 21 + 300 + 323 + 2 + 20 = 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 = 21300323193 and 21300323202.

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 31 ways as a sum of consecutive naturals, for example, 1787017 + ... + 1798896.

It is an arithmetic number, because the mean of its divisors is an integer number (753041940).

Almost surely, 2^21300323220 is an apocalyptic number.

21300323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300323220 is an abundant number, since it is smaller than the sum of its proper divisors (50991703020).

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

21300323220 is a wasteful number, since it uses less digits than its factorization.

21300323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585942 (or 3585934 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21300323220 its reverse (2232300312), we get a palindrome (23532623532).

The spelling of 21300323220 in words is "twenty-one billion, three hundred million, three hundred twenty-three thousand, two hundred twenty".