21240441232 has 40 divisors (see below), whose sum is σ = 42617361600. Its totient is φ = 10243185792.

The previous prime is 21240441217. The next prime is 21240441269. The reversal of 21240441232 is 23214404212.

It is a junction number, because it is equal to n+sod(n) for n = 21240441197 and 21240441206.

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, 425019 + ... + 472357.

It is an arithmetic number, because the mean of its divisors is an integer number (1065434040).

Almost surely, 2^21240441232 is an apocalyptic number.

It is an amenable number.

21240441232 is an abundant number, since it is smaller than the sum of its proper divisors (21376920368).

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

21240441232 is a wasteful number, since it uses less digits than its factorization.

21240441232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48343 (or 48337 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21240441232 its reverse (23214404212), we get a palindrome (44454845444).

The spelling of 21240441232 in words is "twenty-one billion, two hundred forty million, four hundred forty-one thousand, two hundred thirty-two".