21044024412 has 24 divisors (see below), whose sum is σ = 49114014096. Its totient is φ = 7013061888.

The previous prime is 21044024399. The next prime is 21044024453. The reversal of 21044024412 is 21442044012.

It is a congruent number.

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, 146653 + ... + 252180.

It is an arithmetic number, because the mean of its divisors is an integer number (2046417254).

Almost surely, 2^21044024412 is an apocalyptic number.

It is an amenable number.

21044024412 is an abundant number, since it is smaller than the sum of its proper divisors (28069989684).

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

21044024412 is a wasteful number, since it uses less digits than its factorization.

21044024412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403237 (or 403235 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21044024412 its reverse (21442044012), we get a palindrome (42486068424).

The spelling of 21044024412 in words is "twenty-one billion, forty-four million, twenty-four thousand, four hundred twelve".