20305244116625 has 16 divisors (see below), whose sum is σ = 27290248094928. Its totient is φ = 14994641808000.

The previous prime is 20305244116621. The next prime is 20305244116667. The reversal of 20305244116625 is 52661144250302.

It can be written as a sum of positive squares in 8 ways, for example, as 6742103061136 + 13563141055489 = 2596556^2 + 3682817^2 .

It is not a de Polignac number, because 20305244116625 - 2² = 20305244116621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20305244116621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6247765796 + ... + 6247769045.

It is an arithmetic number, because the mean of its divisors is an integer number (1705640505933).

Almost surely, 2^{20305244116625} is an apocalyptic number.

20305244116625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20305244116625 is a deficient number, since it is larger than the sum of its proper divisors (6985003978303).

20305244116625 is a wasteful number, since it uses less digits than its factorization.

20305244116625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12495534869 (or 12495534859 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

Adding to 20305244116625 its reverse (52661144250302), we get a palindrome (72966388366927).

The spelling of 20305244116625 in words is "twenty trillion, three hundred five billion, two hundred forty-four million, one hundred sixteen thousand, six hundred twenty-five".