21233045560 has 128 divisors (see below), whose sum is σ = 51939014400. Its totient is φ = 7780515840.

The previous prime is 21233045531. The next prime is 21233045597. The reversal of 21233045560 is 6554033212.

It is a happy number.

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, 20435521 + ... + 20436559.

It is an arithmetic number, because the mean of its divisors is an integer number (405773550).

Almost surely, 2^21233045560 is an apocalyptic number.

21233045560 is a gapful number since it is divisible by the number (20) 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 21233045560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25969507200).

21233045560 is an abundant number, since it is smaller than the sum of its proper divisors (30705968840).

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

21233045560 is a wasteful number, since it uses less digits than its factorization.

21233045560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 21233045560 its reverse (6554033212), we get a palindrome (27787078772).

The spelling of 21233045560 in words is "twenty-one billion, two hundred thirty-three million, forty-five thousand, five hundred sixty".