21233232750 has 96 divisors (see below), whose sum is σ = 53412207264. Its totient is φ = 5618150400.

The previous prime is 21233232637. The next prime is 21233232751. The reversal of 21233232750 is 5723233212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233232751) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55439059 + ... + 55439441.

It is an arithmetic number, because the mean of its divisors is an integer number (556377159).

Almost surely, 2^21233232750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233232750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26706103632).

21233232750 is an abundant number, since it is smaller than the sum of its proper divisors (32178974514).

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

21233232750 is an equidigital number, since it uses as much as digits as its factorization.

21233232750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

Adding to 21233232750 its reverse (5723233212), we get a palindrome (26956465962).

The spelling of 21233232750 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-two thousand, seven hundred fifty".