21344424241 has 16 divisors (see below), whose sum is σ = 25240060800. Its totient is φ = 17660659968.

The previous prime is 21344424217. The next prime is 21344424259. The reversal of 21344424241 is 14242444312.

It is a happy number.

It is not a de Polignac number, because 21344424241 - 2¹¹ = 21344422193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344424641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1422265 + ... + 1437193.

It is an arithmetic number, because the mean of its divisors is an integer number (1577503800).

Almost surely, 2^21344424241 is an apocalyptic number.

It is an amenable number.

21344424241 is a deficient number, since it is larger than the sum of its proper divisors (3895636559).

21344424241 is a wasteful number, since it uses less digits than its factorization.

21344424241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008.

The product of its digits is 24576, while the sum is 31.

Adding to 21344424241 its reverse (14242444312), we get a palindrome (35586868553).

The spelling of 21344424241 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty-four thousand, two hundred forty-one".