21322020000 has 240 divisors, whose sum is σ = 71438032512. Its totient is φ = 5564160000.

The previous prime is 21322019987. The next prime is 21322020053. The reversal of 21322020000 is 2022312.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2816220 + ... + 2823780.

Almost surely, 2^21322020000 is an apocalyptic number.

21322020000 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 21322020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35719016256).

21322020000 is an abundant number, since it is smaller than the sum of its proper divisors (50116012512).

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

21322020000 is an equidigital number, since it uses as much as digits as its factorization.

21322020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641 (or 7618 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21322020000 its reverse (2022312), we get a palindrome (21324042312).

The spelling of 21322020000 in words is "twenty-one billion, three hundred twenty-two million, twenty thousand".