20345203010225 has 12 divisors (see below), whose sum is σ = 25248849834396. Its totient is φ = 16262744278080.

The previous prime is 20345203010221. The next prime is 20345203010299. The reversal of 20345203010225 is 52201030254302.

It can be written as a sum of positive squares in 6 ways, for example, as 340757057536 + 20004445952689 = 583744^2 + 4472633^2 .

It is not a de Polignac number, because 20345203010225 - 2² = 20345203010221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345203010221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335422322 + ... + 335482971.

It is an arithmetic number, because the mean of its divisors is an integer number (2104070819533).

Almost surely, 2^{20345203010225} is an apocalyptic number.

20345203010225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20345203010225 is a deficient number, since it is larger than the sum of its proper divisors (4903646824171).

20345203010225 is a wasteful number, since it uses less digits than its factorization.

20345203010225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670906516 (or 670906511 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20345203010225 its reverse (52201030254302), we get a palindrome (72546233264527).

The spelling of 20345203010225 in words is "twenty trillion, three hundred forty-five billion, two hundred three million, ten thousand, two hundred twenty-five".