21983598432 has 72 divisors (see below), whose sum is σ = 63372300264. Its totient is φ = 7227477504.

The previous prime is 21983598397. The next prime is 21983598449. The reversal of 21983598432 is 23489538912.

21983598432 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 3 + 598 + 43 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501798 + ... + 543845.

It is an arithmetic number, because the mean of its divisors is an integer number (880170837).

Almost surely, 2^21983598432 is an apocalyptic number.

It is an amenable number.

21983598432 is an abundant number, since it is smaller than the sum of its proper divisors (41388701832).

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

21983598432 is a wasteful number, since it uses less digits than its factorization.

21983598432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045732 (or 1045721 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 21983598432 in words is "twenty-one billion, nine hundred eighty-three million, five hundred ninety-eight thousand, four hundred thirty-two".