21342044424 has 32 divisors (see below), whose sum is σ = 56163276000. Its totient is φ = 6739592832.

The previous prime is 21342044401. The next prime is 21342044461. The reversal of 21342044424 is 42444024312.

It is a junction number, because it is equal to n+sod(n) for n = 21342044391 and 21342044400.

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, 23400909 + ... + 23401820.

It is an arithmetic number, because the mean of its divisors is an integer number (1755102375).

Almost surely, 2^21342044424 is an apocalyptic number.

21342044424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21342044424 is an abundant number, since it is smaller than the sum of its proper divisors (34821231576).

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

21342044424 is a wasteful number, since it uses less digits than its factorization.

21342044424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46802757 (or 46802753 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 21342044424 its reverse (42444024312), we get a palindrome (63786068736).

The spelling of 21342044424 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, four hundred twenty-four".