21833844480 has 432 divisors, whose sum is σ = 87540922560. Its totient is φ = 4920901632.

The previous prime is 21833844469. The next prime is 21833844511. The reversal of 21833844480 is 8444833812.

It is a happy number.

21833844480 is a `hidden beast` number, since 21 + 83 + 38 + 44 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 5884866 + ... + 5888574.

Almost surely, 2^21833844480 is an apocalyptic number.

21833844480 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 21833844480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43770461280).

21833844480 is an abundant number, since it is smaller than the sum of its proper divisors (65707078080).

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

21833844480 is a wasteful number, since it uses less digits than its factorization.

21833844480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 21833844480 in words is "twenty-one billion, eight hundred thirty-three million, eight hundred forty-four thousand, four hundred eighty".