21483815936 has 88 divisors (see below), whose sum is σ = 46987591296. Its totient is φ = 9736888320.

The previous prime is 21483815933. The next prime is 21483815959. The reversal of 21483815936 is 63951838412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (88).

It is not an unprimeable number, because it can be changed into a prime (21483815933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4131290 + ... + 4136486.

Almost surely, 2^21483815936 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 21483815936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23493795648).

21483815936 is an abundant number, since it is smaller than the sum of its proper divisors (25503775360).

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

21483815936 is a wasteful number, since it uses less digits than its factorization.

21483815936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595 (or 5577 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The spelling of 21483815936 in words is "twenty-one billion, four hundred eighty-three million, eight hundred fifteen thousand, nine hundred thirty-six".