21320441152 has 28 divisors (see below), whose sum is σ = 42312417280. Its totient is φ = 10659044736.

The previous prime is 21320441111. The next prime is 21320441161. The reversal of 21320441152 is 25114402312.

It is a super-2 number, since 2×21320441152² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030849 + ... + 1051327.

It is an arithmetic number, because the mean of its divisors is an integer number (1511157760).

Almost surely, 2^21320441152 is an apocalyptic number.

It is an amenable number.

21320441152 is a deficient number, since it is larger than the sum of its proper divisors (20991976128).

21320441152 is a wasteful number, since it uses less digits than its factorization.

21320441152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36758 (or 36748 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21320441152 its reverse (25114402312), we get a palindrome (46434843464).

The spelling of 21320441152 in words is "twenty-one billion, three hundred twenty million, four hundred forty-one thousand, one hundred fifty-two".