20127253165225 has 12 divisors (see below), whose sum is σ = 24960878049996. Its totient is φ = 16099812774080.

The previous prime is 20127253165133. The next prime is 20127253165273. The reversal of 20127253165225 is 52256135272102.

It can be written as a sum of positive squares in 6 ways, for example, as 1014478027369 + 19112775137856 = 1007213^2 + 4371816^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20127253165225 is a prime.

It is a super-2 number, since 2×20127253165225² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49537582 + ... + 49942231.

It is an arithmetic number, because the mean of its divisors is an integer number (2080073170833).

Almost surely, 2^{20127253165225} is an apocalyptic number.

20127253165225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20127253165225 is a deficient number, since it is larger than the sum of its proper divisors (4833624884771).

20127253165225 is an equidigital number, since it uses as much as digits as its factorization.

20127253165225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99487916 (or 99487911 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 20127253165225 in words is "twenty trillion, one hundred twenty-seven billion, two hundred fifty-three million, one hundred sixty-five thousand, two hundred twenty-five".