21300300000 has 1152 divisors, whose sum is σ = 94493952000. Its totient is φ = 4656960000.

The previous prime is 21300299989. The next prime is 21300300013. The reversal of 21300300000 is 300312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 926099989 + ... + 926100011.

It is an arithmetic number, because the mean of its divisors is an integer number (82026000).

Almost surely, 2^21300300000 is an apocalyptic number.

21300300000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47246976000).

21300300000 is an abundant number, since it is smaller than the sum of its proper divisors (73193652000).

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

21300300000 is an frugal number, since it uses more digits than its factorization.

21300300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

Adding to 21300300000 its reverse (300312), we get a palindrome (21300600312).

The spelling of 21300300000 in words is "twenty-one billion, three hundred million, three hundred thousand".