20345032204225 has 24 divisors (see below), whose sum is σ = 26328152515392. Its totient is φ = 15566332161600.

The previous prime is 20345032204223. The next prime is 20345032204279. The reversal of 20345032204225 is 52240223054302.

It is not a de Polignac number, because 20345032204225 - 2¹ = 20345032204223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345032204223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2080015 + ... + 6709435.

It is an arithmetic number, because the mean of its divisors is an integer number (1097006354808).

Almost surely, 2^{20345032204225} is an apocalyptic number.

20345032204225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20345032204225 is a deficient number, since it is larger than the sum of its proper divisors (5983120311167).

20345032204225 is a wasteful number, since it uses less digits than its factorization.

20345032204225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637097 (or 4637092 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 20345032204225 its reverse (52240223054302), we get a palindrome (72585255258527).

The spelling of 20345032204225 in words is "twenty trillion, three hundred forty-five billion, thirty-two million, two hundred four thousand, two hundred twenty-five".