20616113366 has 4 divisors (see below), whose sum is σ = 30924170052. Its totient is φ = 10308056682.

The previous prime is 20616113263. The next prime is 20616113383. The reversal of 20616113366 is 66331161602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66331161602 = 2 ⋅33165580801.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5154028340 + ... + 5154028343.

It is an arithmetic number, because the mean of its divisors is an integer number (7731042513).

Almost surely, 2^20616113366 is an apocalyptic number.

20616113366 is a deficient number, since it is larger than the sum of its proper divisors (10308056686).

20616113366 is a wasteful number, since it uses less digits than its factorization.

20616113366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308056685.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 20616113366 its reverse (66331161602), we get a palindrome (86947274968).

The spelling of 20616113366 in words is "twenty billion, six hundred sixteen million, one hundred thirteen thousand, three hundred sixty-six".