9221018640 has 320 divisors, whose sum is σ = 30920520960. Its totient is φ = 2268241920.

The previous prime is 9221018633. The next prime is 9221018647. The reversal of 9221018640 is 468101229.

It is an interprime number because it is at equal distance from previous prime (9221018633) and next prime (9221018647).

It is not an unprimeable number, because it can be changed into a prime (9221018647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15708427 + ... + 15709013.

It is an arithmetic number, because the mean of its divisors is an integer number (96626628).

Almost surely, 2^9221018640 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 9221018640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15460260480).

9221018640 is an abundant number, since it is smaller than the sum of its proper divisors (21699502320).

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

9221018640 is a wasteful number, since it uses less digits than its factorization.

9221018640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 9221018640 is about 96026.1351924569. The cubic root of 9221018640 is about 2096.9736179965.

Adding to 9221018640 its reverse (468101229), we get a palindrome (9689119869).

The spelling of 9221018640 in words is "nine billion, two hundred twenty-one million, eighteen thousand, six hundred forty".