21033232230 has 32 divisors (see below), whose sum is σ = 52220440800. Its totient is φ = 5415452672.

The previous prime is 21033232229. The next prime is 21033232247. The reversal of 21033232230 is 3223233012.

It is a super-2 number, since 2×21033232230² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21033232197 and 21033232206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12087195 + ... + 12088934.

It is an arithmetic number, because the mean of its divisors is an integer number (1631888775).

Almost surely, 2^21033232230 is an apocalyptic number.

21033232230 is an abundant number, since it is smaller than the sum of its proper divisors (31187208570).

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

21033232230 is a wasteful number, since it uses less digits than its factorization.

21033232230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24176168.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21033232230 its reverse (3223233012), we get a palindrome (24256465242).

The spelling of 21033232230 in words is "twenty-one billion, thirty-three million, two hundred thirty-two thousand, two hundred thirty".