20045213425 has 12 divisors (see below), whose sum is σ = 25527851356. Its totient is φ = 15602760000.

The previous prime is 20045213411. The next prime is 20045213429. The reversal of 20045213425 is 52431254002.

It can be written as a sum of positive squares in 6 ways, for example, as 639887616 + 19405325809 = 25296^2 + 139303^2 .

It is not a de Polignac number, because 20045213425 - 2⁵ = 20045213393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20045213393 and 20045213402.

It is not an unprimeable number, because it can be changed into a prime (20045213429) 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 11 ways as a sum of consecutive naturals, for example, 10834326 + ... + 10836175.

Almost surely, 2^20045213425 is an apocalyptic number.

20045213425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20045213425 is a deficient number, since it is larger than the sum of its proper divisors (5482637931).

20045213425 is a wasteful number, since it uses less digits than its factorization.

20045213425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21670548 (or 21670543 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20045213425 its reverse (52431254002), we get a palindrome (72476467427).

The spelling of 20045213425 in words is "twenty billion, forty-five million, two hundred thirteen thousand, four hundred twenty-five".