20045434225 has 12 divisors (see below), whose sum is σ = 25014663964. Its totient is φ = 15934201920.

The previous prime is 20045434187. The next prime is 20045434229. The reversal of 20045434225 is 52243454002.

It can be written as a sum of positive squares in 6 ways, for example, as 2886268176 + 17159166049 = 53724^2 + 130993^2 .

It is not a de Polignac number, because 20045434225 - 2¹¹ = 20045432177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045434229) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2549634 + ... + 2557483.

Almost surely, 2^20045434225 is an apocalyptic number.

20045434225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20045434225 is a deficient number, since it is larger than the sum of its proper divisors (4969229739).

20045434225 is a wasteful number, since it uses less digits than its factorization.

20045434225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107284 (or 5107279 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 20045434225 its reverse (52243454002), we get a palindrome (72288888227).

The spelling of 20045434225 in words is "twenty billion, forty-five million, four hundred thirty-four thousand, two hundred twenty-five".