20512224434 has 16 divisors (see below), whose sum is σ = 33277352472. Its totient is φ = 9426546048.

The previous prime is 20512224433. The next prime is 20512224479. The reversal of 20512224434 is 43442221502.

It can be written as a sum of positive squares in 4 ways, for example, as 6552093025 + 13960131409 = 80945^2 + 118153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20512224397 and 20512224406.

It is not an unprimeable number, because it can be changed into a prime (20512224433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686929 + ... + 1699044.

Almost surely, 2^20512224434 is an apocalyptic number.

20512224434 is a deficient number, since it is larger than the sum of its proper divisors (12765128038).

20512224434 is a wasteful number, since it uses less digits than its factorization.

20512224434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386221.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 20512224434 its reverse (43442221502), we get a palindrome (63954445936).

The spelling of 20512224434 in words is "twenty billion, five hundred twelve million, two hundred twenty-four thousand, four hundred thirty-four".