21454883208 has 128 divisors (see below), whose sum is σ = 65302848000. Its totient is φ = 6472676160.

The previous prime is 21454883183. The next prime is 21454883237. The reversal of 21454883208 is 80238845412.

21454883208 is a `hidden beast` number, since 2 + 1 + 4 + 548 + 83 + 20 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 519463 + ... + 559241.

It is an arithmetic number, because the mean of its divisors is an integer number (510178500).

Almost surely, 2^21454883208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21454883208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32651424000).

21454883208 is an abundant number, since it is smaller than the sum of its proper divisors (43847964792).

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

21454883208 is a wasteful number, since it uses less digits than its factorization.

21454883208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40032 (or 40022 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The spelling of 21454883208 in words is "twenty-one billion, four hundred fifty-four million, eight hundred eighty-three thousand, two hundred eight".