20021433224 has 16 divisors (see below), whose sum is σ = 40427894220. Its totient is φ = 9240661440.

The previous prime is 20021433209. The next prime is 20021433233. The reversal of 20021433224 is 42233412002.

It can be written as a sum of positive squares in 2 ways, for example, as 19731820900 + 289612324 = 140470^2 + 17018^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021433224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96256787 + ... + 96256994.

Almost surely, 2^20021433224 is an apocalyptic number.

It is an amenable number.

20021433224 is an abundant number, since it is smaller than the sum of its proper divisors (20406460996).

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

20021433224 is a wasteful number, since it uses less digits than its factorization.

20021433224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192513800 (or 192513796 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20021433224 its reverse (42233412002), we get a palindrome (62254845226).

The spelling of 20021433224 in words is "twenty billion, twenty-one million, four hundred thirty-three thousand, two hundred twenty-four".