20204515102225 has 24 divisors (see below), whose sum is σ = 25237134898560. Its totient is φ = 16045207854720.

The previous prime is 20204515102159. The next prime is 20204515102231. The reversal of 20204515102225 is 52220151540202.

It is not a de Polignac number, because 20204515102225 - 2¹¹ = 20204515100177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229701604 + ... + 229789546.

It is an arithmetic number, because the mean of its divisors is an integer number (1051547287440).

Almost surely, 2^{20204515102225} is an apocalyptic number.

20204515102225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20204515102225 is a deficient number, since it is larger than the sum of its proper divisors (5032619796335).

20204515102225 is a wasteful number, since it uses less digits than its factorization.

20204515102225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155169 (or 155164 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 20204515102225 its reverse (52220151540202), we get a palindrome (72424666642427).

The spelling of 20204515102225 in words is "twenty trillion, two hundred four billion, five hundred fifteen million, one hundred two thousand, two hundred twenty-five".