20145434450 has 12 divisors (see below), whose sum is σ = 37470508170. Its totient is φ = 8058173760.

The previous prime is 20145434417. The next prime is 20145434471. The reversal of 20145434450 is 5443454102.

It can be written as a sum of positive squares in 3 ways, for example, as 19312938841 + 832495609 = 138971^2 + 28853^2 .

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 5 ways as a sum of consecutive naturals, for example, 201454295 + ... + 201454394.

Almost surely, 2^20145434450 is an apocalyptic number.

20145434450 is a deficient number, since it is larger than the sum of its proper divisors (17325073720).

20145434450 is a wasteful number, since it uses less digits than its factorization.

20145434450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402908701 (or 402908696 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 20145434450 its reverse (5443454102), we get a palindrome (25588888552).

The spelling of 20145434450 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred fifty".