21443331120 has 40 divisors (see below), whose sum is σ = 66474327216. Its totient is φ = 5718221568.

The previous prime is 21443331103. The next prime is 21443331127. The reversal of 21443331120 is 2113334412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21443331127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44673367 + ... + 44673846.

Almost surely, 2^21443331120 is an apocalyptic number.

21443331120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21443331120 is an abundant number, since it is smaller than the sum of its proper divisors (45030996096).

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

21443331120 is a wasteful number, since it uses less digits than its factorization.

21443331120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89347229 (or 89347223 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21443331120 its reverse (2113334412), we get a palindrome (23556665532).

The spelling of 21443331120 in words is "twenty-one billion, four hundred forty-three million, three hundred thirty-one thousand, one hundred twenty".