21300204300 has 144 divisors (see below), whose sum is σ = 62623491840. Its totient is φ = 5589077760.

The previous prime is 21300204283. The next prime is 21300204313. The reversal of 21300204300 is 340200312.

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 21300204300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5034586 + ... + 5038814.

It is an arithmetic number, because the mean of its divisors is an integer number (434885360).

Almost surely, 2^21300204300 is an apocalyptic number.

21300204300 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 21300204300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31311745920).

21300204300 is an abundant number, since it is smaller than the sum of its proper divisors (41323287540).

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

21300204300 is a wasteful number, since it uses less digits than its factorization.

21300204300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 4505 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21300204300 its reverse (340200312), we get a palindrome (21640404612).

The spelling of 21300204300 in words is "twenty-one billion, three hundred million, two hundred four thousand, three hundred".