8921718432 has 480 divisors, whose sum is σ = 30911569920. Its totient is φ = 2495162880.

The previous prime is 8921718397. The next prime is 8921718457. The reversal of 8921718432 is 2348171298.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 23294113 + ... + 23294495.

It is an arithmetic number, because the mean of its divisors is an integer number (64399104).

Almost surely, 2^8921718432 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 8921718432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15455784960).

8921718432 is an abundant number, since it is smaller than the sum of its proper divisors (21989851488).

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

8921718432 is a wasteful number, since it uses less digits than its factorization.

8921718432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 461 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 8921718432 is about 94454.8486420893. The cubic root of 8921718432 is about 2074.0354297137.

The spelling of 8921718432 in words is "eight billion, nine hundred twenty-one million, seven hundred eighteen thousand, four hundred thirty-two".