21324242000 has 80 divisors (see below), whose sum is σ = 51593697792. Its totient is φ = 8524457600.

The previous prime is 21324241993. The next prime is 21324242033. The reversal of 21324242000 is 24242312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6044237 + ... + 6047763.

Almost surely, 2^21324242000 is an apocalyptic number.

21324242000 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 21324242000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25796848896).

21324242000 is an abundant number, since it is smaller than the sum of its proper divisors (30269455792).

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

21324242000 is a wasteful number, since it uses less digits than its factorization.

21324242000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6573 (or 6557 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21324242000 its reverse (24242312), we get a palindrome (21348484312).

The spelling of 21324242000 in words is "twenty-one billion, three hundred twenty-four million, two hundred forty-two thousand".