21483081368 has 96 divisors (see below), whose sum is σ = 49031308800. Its totient is φ = 8782095168.

The previous prime is 21483081359. The next prime is 21483081379. The reversal of 21483081368 is 86318038412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3413921 + ... + 3420207.

It is an arithmetic number, because the mean of its divisors is an integer number (510742800).

Almost surely, 2^21483081368 is an apocalyptic number.

21483081368 is a gapful number since it is divisible by the number (28) 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 21483081368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24515654400).

21483081368 is an abundant number, since it is smaller than the sum of its proper divisors (27548227432).

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

21483081368 is a wasteful number, since it uses less digits than its factorization.

21483081368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709 (or 6698 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 21483081368 in words is "twenty-one billion, four hundred eighty-three million, eighty-one thousand, three hundred sixty-eight".