21244024333 has 8 divisors (see below), whose sum is σ = 24774372800. Its totient is φ = 18209163420.

The previous prime is 21244024301. The next prime is 21244024337. The reversal of 21244024333 is 33342044212.

It is not a de Polignac number, because 21244024333 - 2⁵ = 21244024301 is a prime.

It is a super-2 number, since 2×21244024333² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244024337) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30967623 + ... + 30968308.

It is an arithmetic number, because the mean of its divisors is an integer number (3096796600).

Almost surely, 2^21244024333 is an apocalyptic number.

It is an amenable number.

21244024333 is a deficient number, since it is larger than the sum of its proper divisors (3530348467).

21244024333 is an frugal number, since it uses more digits than its factorization.

21244024333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61935952 (or 61935938 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21244024333 its reverse (33342044212), we get a palindrome (54586068545).

The spelling of 21244024333 in words is "twenty-one billion, two hundred forty-four million, twenty-four thousand, three hundred thirty-three".