21432300000 has 288 divisors, whose sum is σ = 70870464000. Its totient is φ = 5670720000.

The previous prime is 21432299929. The next prime is 21432300017. The reversal of 21432300000 is 323412.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 59699821 + ... + 59700179.

It is an arithmetic number, because the mean of its divisors is an integer number (246078000).

Almost surely, 2^21432300000 is an apocalyptic number.

21432300000 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 21432300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35435232000).

21432300000 is an abundant number, since it is smaller than the sum of its proper divisors (49438164000).

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

21432300000 is an equidigital number, since it uses as much as digits as its factorization.

21432300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 568 counting only the distinct ones).

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

Adding to 21432300000 its reverse (323412), we get a palindrome (21432623412).

The spelling of 21432300000 in words is "twenty-one billion, four hundred thirty-two million, three hundred thousand".