10021443564 has 96 divisors (see below), whose sum is σ = 25889955840. Its totient is φ = 2991643200.

The previous prime is 10021443559. The next prime is 10021443569. The reversal of 10021443564 is 46534412001.

It is an interprime number because it is at equal distance from previous prime (10021443559) and next prime (10021443569).

It is a super-2 number, since 2×10021443564² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10021443569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6579307 + ... + 6580829.

It is an arithmetic number, because the mean of its divisors is an integer number (269687040).

Almost surely, 2^10021443564 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 10021443564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12944977920).

10021443564 is an abundant number, since it is smaller than the sum of its proper divisors (15868512276).

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

10021443564 is a wasteful number, since it uses less digits than its factorization.

10021443564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2249 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 10021443564 its reverse (46534412001), we get a palindrome (56555855565).

The spelling of 10021443564 in words is "ten billion, twenty-one million, four hundred forty-three thousand, five hundred sixty-four".