21114433024 has 80 divisors (see below), whose sum is σ = 45877228848. Its totient is φ = 9667510272.

The previous prime is 21114433019. The next prime is 21114433049. The reversal of 21114433024 is 42033441112.

It is a self number, because there is not a number n which added to its sum of digits gives 21114433024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289267 + ... + 354829.

Almost surely, 2^21114433024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21114433024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22938614424).

21114433024 is an abundant number, since it is smaller than the sum of its proper divisors (24762795824).

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

21114433024 is an equidigital number, since it uses as much as digits as its factorization.

21114433024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65635 (or 65619 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21114433024 its reverse (42033441112), we get a palindrome (63147874136).

The spelling of 21114433024 in words is "twenty-one billion, one hundred fourteen million, four hundred thirty-three thousand, twenty-four".