21224032520232 has 16 divisors (see below), whose sum is σ = 53060081300640. Its totient is φ = 7074677506736.

The previous prime is 21224032520221. The next prime is 21224032520233. The reversal of 21224032520232 is 23202523042212.

It is a self number, because there is not a number n which added to its sum of digits gives 21224032520232.

It is not an unprimeable number, because it can be changed into a prime (21224032520233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442167344148 + ... + 442167344195.

It is an arithmetic number, because the mean of its divisors is an integer number (3316255081290).

Almost surely, 2^{21224032520232} is an apocalyptic number.

It is an amenable number.

21224032520232 is an abundant number, since it is smaller than the sum of its proper divisors (31836048780408).

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

21224032520232 is a wasteful number, since it uses less digits than its factorization.

21224032520232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884334688352 (or 884334688348 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21224032520232 its reverse (23202523042212), we get a palindrome (44426555562444).

The spelling of 21224032520232 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred twenty thousand, two hundred thirty-two".