21822768000 has 768 divisors, whose sum is σ = 89361792000. Its totient is φ = 5051904000.

The previous prime is 21822767963. The next prime is 21822768053. The reversal of 21822768000 is 86722812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36431701 + ... + 36432299.

It is an arithmetic number, because the mean of its divisors is an integer number (116356500).

Almost surely, 2^21822768000 is an apocalyptic number.

21822768000 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 21822768000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44680896000).

21822768000 is an abundant number, since it is smaller than the sum of its proper divisors (67539024000).

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

21822768000 is a wasteful number, since it uses less digits than its factorization.

21822768000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 21822768000 in words is "twenty-one billion, eight hundred twenty-two million, seven hundred sixty-eight thousand".