21233000232 has 128 divisors (see below), whose sum is σ = 62148240000. Its totient is φ = 6698308608.

The previous prime is 21233000207. The next prime is 21233000279. The reversal of 21233000232 is 23200033212.

It is a happy number.

It is a super-2 number, since 2×21233000232² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5320894 + ... + 5324882.

It is an arithmetic number, because the mean of its divisors is an integer number (485533125).

Almost surely, 2^21233000232 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 21233000232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31074120000).

21233000232 is an abundant number, since it is smaller than the sum of its proper divisors (40915239768).

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

21233000232 is a wasteful number, since it uses less digits than its factorization.

21233000232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21233000232 its reverse (23200033212), we get a palindrome (44433033444).

The spelling of 21233000232 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-two", and thus it is an aban number.