21004300000 has 288 divisors, whose sum is σ = 54570257280. Its totient is φ = 7948800000.

The previous prime is 21004299989. The next prime is 21004300027. The reversal of 21004300000 is 340012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 21004300000.

It is a congruent number.

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, 192699946 + ... + 192700054.

It is an arithmetic number, because the mean of its divisors is an integer number (189480060).

Almost surely, 2^21004300000 is an apocalyptic number.

21004300000 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 21004300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27285128640).

21004300000 is an abundant number, since it is smaller than the sum of its proper divisors (33565957280).

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

21004300000 is an equidigital number, since it uses as much as digits as its factorization.

21004300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 21004300000 its reverse (340012), we get a palindrome (21004640012).

The spelling of 21004300000 in words is "twenty-one billion, four million, three hundred thousand".