20665532632625 has 32 divisors (see below), whose sum is σ = 27636686348544. Its totient is φ = 15372461280000.

The previous prime is 20665532632559. The next prime is 20665532632627. The reversal of 20665532632625 is 52623623556602.

It is not a de Polignac number, because 20665532632625 - 2¹⁴ = 20665532616241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20665532632627) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 58407701 + ... + 58760450.

It is an arithmetic number, because the mean of its divisors is an integer number (863646448392).

Almost surely, 2^{20665532632625} is an apocalyptic number.

20665532632625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20665532632625 is a deficient number, since it is larger than the sum of its proper divisors (6971153715919).

20665532632625 is a wasteful number, since it uses less digits than its factorization.

20665532632625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117168266 (or 117168256 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 53.

The spelling of 20665532632625 in words is "twenty trillion, six hundred sixty-five billion, five hundred thirty-two million, six hundred thirty-two thousand, six hundred twenty-five".