21330022000 has 320 divisors, whose sum is σ = 61671767040. Its totient is φ = 6980736000.

The previous prime is 21330021991. The next prime is 21330022013. The reversal of 21330022000 is 22003312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43441755 + ... + 43442245.

It is an arithmetic number, because the mean of its divisors is an integer number (192724272).

Almost surely, 2^21330022000 is an apocalyptic number.

21330022000 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 21330022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30835883520).

21330022000 is an abundant number, since it is smaller than the sum of its proper divisors (40341745040).

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

21330022000 is a wasteful number, since it uses less digits than its factorization.

21330022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21330022000 its reverse (22003312), we get a palindrome (21352025312).

The spelling of 21330022000 in words is "twenty-one billion, three hundred thirty million, twenty-two thousand".