21442344030 has 64 divisors (see below), whose sum is σ = 57305033280. Its totient is φ = 5705413632.

The previous prime is 21442344019. The next prime is 21442344043. The reversal of 21442344030 is 3044324412.

It is a happy number.

21442344030 is a `hidden beast` number, since 21 + 4 + 4 + 234 + 403 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21442343985 and 21442344003.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 36502 + ... + 210278.

It is an arithmetic number, because the mean of its divisors is an integer number (895391145).

Almost surely, 2^21442344030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21442344030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28652516640).

21442344030 is an abundant number, since it is smaller than the sum of its proper divisors (35862689250).

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

21442344030 is a wasteful number, since it uses less digits than its factorization.

21442344030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174250 (or 174244 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21442344030 its reverse (3044324412), we get a palindrome (24486668442).

The spelling of 21442344030 in words is "twenty-one billion, four hundred forty-two million, three hundred forty-four thousand, thirty".