20425213100225 has 6 divisors (see below), whose sum is σ = 25327264244310. Its totient is φ = 16340170480160.

The previous prime is 20425213100209. The next prime is 20425213100261. The reversal of 20425213100225 is 52200131252402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2471281464961 + 17953931635264 = 1572031^2 + 4237208^2 .

It is not a de Polignac number, because 20425213100225 - 2⁴ = 20425213100209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408504261980 + ... + 408504262029.

It is an arithmetic number, because the mean of its divisors is an integer number (4221210707385).

Almost surely, 2^{20425213100225} is an apocalyptic number.

20425213100225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20425213100225 is a deficient number, since it is larger than the sum of its proper divisors (4902051144085).

20425213100225 is an equidigital number, since it uses as much as digits as its factorization.

20425213100225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817008524019 (or 817008524014 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20425213100225 its reverse (52200131252402), we get a palindrome (72625344352627).

The spelling of 20425213100225 in words is "twenty trillion, four hundred twenty-five billion, two hundred thirteen million, one hundred thousand, two hundred twenty-five".