20424234434 has 16 divisors (see below), whose sum is σ = 31704636600. Its totient is φ = 9856285824.

The previous prime is 20424234371. The next prime is 20424234461. The reversal of 20424234434 is 43443242402.

It can be written as a sum of positive squares in 4 ways, for example, as 20035553209 + 388681225 = 141547^2 + 19715^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20424234434.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 93764 + ... + 222800.

Almost surely, 2^20424234434 is an apocalyptic number.

20424234434 is a deficient number, since it is larger than the sum of its proper divisors (11280402166).

20424234434 is a wasteful number, since it uses less digits than its factorization.

20424234434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131797.

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 20424234434 its reverse (43443242402), we get a palindrome (63867476836).

The spelling of 20424234434 in words is "twenty billion, four hundred twenty-four million, two hundred thirty-four thousand, four hundred thirty-four".