21424102230344 has 32 divisors (see below), whose sum is σ = 43825415912640. Its totient is φ = 9737475259200.

The previous prime is 21424102230337. The next prime is 21424102230359. The reversal of 21424102230344 is 44303220142412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21424102230344.

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, 8267564 + ... + 10545179.

It is an arithmetic number, because the mean of its divisors is an integer number (1369544247270).

Almost surely, 2^{21424102230344} is an apocalyptic number.

It is an amenable number.

21424102230344 is an abundant number, since it is smaller than the sum of its proper divisors (22401313682296).

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

21424102230344 is a wasteful number, since it uses less digits than its factorization.

21424102230344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825701 (or 18825697 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21424102230344 its reverse (44303220142412), we get a palindrome (65727322372756).

The spelling of 21424102230344 in words is "twenty-one trillion, four hundred twenty-four billion, one hundred two million, two hundred thirty thousand, three hundred forty-four".