20116235712665 has 32 divisors (see below), whose sum is σ = 25609529702400. Its totient is φ = 15126404045760.

The previous prime is 20116235712659. The next prime is 20116235712679. The reversal of 20116235712665 is 56621753261102.

It is not a de Polignac number, because 20116235712665 - 2¹⁰ = 20116235711641 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19719344 + ... + 20714366.

It is an arithmetic number, because the mean of its divisors is an integer number (800297803200).

Almost surely, 2^{20116235712665} is an apocalyptic number.

It is an amenable number.

20116235712665 is a deficient number, since it is larger than the sum of its proper divisors (5493293989735).

20116235712665 is a wasteful number, since it uses less digits than its factorization.

20116235712665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996717.

The product of its (nonzero) digits is 907200, while the sum is 47.

Adding to 20116235712665 its reverse (56621753261102), we get a palindrome (76737988973767).

The spelling of 20116235712665 in words is "twenty trillion, one hundred sixteen billion, two hundred thirty-five million, seven hundred twelve thousand, six hundred sixty-five".