20646200266 has 8 divisors (see below), whose sum is σ = 30970124064. Its totient is φ = 10322825580.

The previous prime is 20646200257. The next prime is 20646200269. The reversal of 20646200266 is 66200264602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20646200269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24870 + ... + 204721.

It is an arithmetic number, because the mean of its divisors is an integer number (3871265508).

Almost surely, 2^20646200266 is an apocalyptic number.

20646200266 is a deficient number, since it is larger than the sum of its proper divisors (10323923798).

20646200266 is a wasteful number, since it uses less digits than its factorization.

20646200266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274556.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 20646200266 its reverse (66200264602), we get a palindrome (86846464868).

The spelling of 20646200266 in words is "twenty billion, six hundred forty-six million, two hundred thousand, two hundred sixty-six".