21232450304 has 72 divisors (see below), whose sum is σ = 45686588640. Its totient is φ = 9790046208.

The previous prime is 21232450303. The next prime is 21232450331. The reversal of 21232450304 is 40305423212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21232450303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4313957 + ... + 4318875.

Almost surely, 2^21232450304 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 21232450304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22843294320).

21232450304 is an abundant number, since it is smaller than the sum of its proper divisors (24454138336).

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

21232450304 is a wasteful number, since it uses less digits than its factorization.

21232450304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245 (or 6231 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21232450304 its reverse (40305423212), we get a palindrome (61537873516).

The spelling of 21232450304 in words is "twenty-one billion, two hundred thirty-two million, four hundred fifty thousand, three hundred four".