21224433042 has 12 divisors (see below), whose sum is σ = 45986271630. Its totient is φ = 7074811008.

The previous prime is 21224433031. The next prime is 21224433049. The reversal of 21224433042 is 24033442212.

21224433042 is a `hidden beast` number, since 2 + 1 + 224 + 433 + 0 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15820859961 + 5403573081 = 125781^2 + 73509^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21224432997 and 21224433015.

It is not an unprimeable number, because it can be changed into a prime (21224433049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589567567 + ... + 589567602.

Almost surely, 2^21224433042 is an apocalyptic number.

21224433042 is an abundant number, since it is smaller than the sum of its proper divisors (24761838588).

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

21224433042 is a wasteful number, since it uses less digits than its factorization.

21224433042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179135177 (or 1179135174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21224433042 its reverse (24033442212), we get a palindrome (45257875254).

The spelling of 21224433042 in words is "twenty-one billion, two hundred twenty-four million, four hundred thirty-three thousand, forty-two".