21442333224 has 32 divisors (see below), whose sum is σ = 57729359520. Its totient is φ = 6597640896.

The previous prime is 21442333153. The next prime is 21442333249. The reversal of 21442333224 is 42233324412.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21442333191 and 21442333200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34362402 + ... + 34363025.

It is an arithmetic number, because the mean of its divisors is an integer number (1804042485).

Almost surely, 2^21442333224 is an apocalyptic number.

21442333224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21442333224 is an abundant number, since it is smaller than the sum of its proper divisors (36287026296).

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

21442333224 is a wasteful number, since it uses less digits than its factorization.

21442333224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68725449 (or 68725445 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

Adding to 21442333224 its reverse (42233324412), we get a palindrome (63675657636).

The spelling of 21442333224 in words is "twenty-one billion, four hundred forty-two million, three hundred thirty-three thousand, two hundred twenty-four".