23206405266 has 96 divisors (see below), whose sum is σ = 57370540032. Its totient is φ = 6710726880.

The previous prime is 23206405223. The next prime is 23206405267. The reversal of 23206405266 is 66250460232.

23206405266 is a `hidden beast` number, since 2 + 3 + 2 + 0 + 640 + 5 + 2 + 6 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 23206405266.

It is not an unprimeable number, because it can be changed into a prime (23206405267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2011671 + ... + 2023173.

It is an arithmetic number, because the mean of its divisors is an integer number (597609792).

Almost surely, 2^23206405266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23206405266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28685270016).

23206405266 is an abundant number, since it is smaller than the sum of its proper divisors (34164134766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23206405266 is a wasteful number, since it uses less digits than its factorization.

23206405266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988 (or 11985 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 23206405266 its reverse (66250460232), we get a palindrome (89456865498).

The spelling of 23206405266 in words is "twenty-three billion, two hundred six million, four hundred five thousand, two hundred sixty-six".