20424234433 has 4 divisors (see below), whose sum is σ = 21499194160. Its totient is φ = 19349274708.

The previous prime is 20424234371. The next prime is 20424234461. The reversal of 20424234433 is 33443242402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424234433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20424234395 and 20424234404.

It is not an unprimeable number, because it can be changed into a prime (20424231433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537479835 + ... + 537479872.

It is an arithmetic number, because the mean of its divisors is an integer number (5374798540).

Almost surely, 2^20424234433 is an apocalyptic number.

It is an amenable number.

20424234433 is a deficient number, since it is larger than the sum of its proper divisors (1074959727).

20424234433 is a wasteful number, since it uses less digits than its factorization.

20424234433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074959726.

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 20424234433 its reverse (33443242402), we get a palindrome (53867476835).

The spelling of 20424234433 in words is "twenty billion, four hundred twenty-four million, two hundred thirty-four thousand, four hundred thirty-three".