21032312244 has 24 divisors (see below), whose sum is σ = 49879911648. Its totient is φ = 6895839840.

The previous prime is 21032312239. The next prime is 21032312281. The reversal of 21032312244 is 44221323012.

It is a happy number.

It is a super-2 number, since 2×21032312244² (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 7 ways as a sum of consecutive naturals, for example, 14365602 + ... + 14367065.

It is an arithmetic number, because the mean of its divisors is an integer number (2078329652).

Almost surely, 2^21032312244 is an apocalyptic number.

It is an amenable number.

21032312244 is an abundant number, since it is smaller than the sum of its proper divisors (28847599404).

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

21032312244 is a wasteful number, since it uses less digits than its factorization.

21032312244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28732735 (or 28732733 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21032312244 its reverse (44221323012), we get a palindrome (65253635256).

The spelling of 21032312244 in words is "twenty-one billion, thirty-two million, three hundred twelve thousand, two hundred forty-four".