21442234324 has 12 divisors (see below), whose sum is σ = 42884468704. Its totient is φ = 9189528984.

The previous prime is 21442234321. The next prime is 21442234361. The reversal of 21442234324 is 42343224412.

21442234324 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442234321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382897014 + ... + 382897069.

Almost surely, 2^21442234324 is an apocalyptic number.

It is an amenable number.

21442234324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21442234324 is a wasteful number, since it uses less digits than its factorization.

21442234324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765794094 (or 765794092 counting only the distinct ones).

The product of its digits is 36864, while the sum is 31.

Adding to 21442234324 its reverse (42343224412), we get a palindrome (63785458736).

The spelling of 21442234324 in words is "twenty-one billion, four hundred forty-two million, two hundred thirty-four thousand, three hundred twenty-four".