21233033304 has 128 divisors (see below), whose sum is σ = 61416714240. Its totient is φ = 5991967872.

The previous prime is 21233033299. The next prime is 21233033323. The reversal of 21233033304 is 40333033212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4570807 + ... + 4575449.

It is an arithmetic number, because the mean of its divisors is an integer number (479818080).

Almost surely, 2^21233033304 is an apocalyptic number.

21233033304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233033304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30708357120).

21233033304 is an abundant number, since it is smaller than the sum of its proper divisors (40183680936).

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

21233033304 is a wasteful number, since it uses less digits than its factorization.

21233033304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4985 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21233033304 its reverse (40333033212), we get a palindrome (61566066516).

The spelling of 21233033304 in words is "twenty-one billion, two hundred thirty-three million, thirty-three thousand, three hundred four".