20726266 has 16 divisors (see below), whose sum is σ = 35391168. Its totient is φ = 9011200.

The previous prime is 20726263. The next prime is 20726267. The reversal of 20726266 is 66262702.

It is not an unprimeable number, because it can be changed into a prime (20726261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19975 + ... + 20986.

It is an arithmetic number, because the mean of its divisors is an integer number (2211948).

Almost surely, 2^20726266 is an apocalyptic number.

20726266 is a deficient number, since it is larger than the sum of its proper divisors (14664902).

20726266 is a wasteful number, since it uses less digits than its factorization.

20726266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40997.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20726266 is about 4552.6108992533. The cubic root of 20726266 is about 274.6884228716.

Adding to 20726266 its reverse (66262702), we get a palindrome (86988968).

It can be divided in two parts, 2072 and 6266, that added together give a palindrome (8338).

The spelling of 20726266 in words is "twenty million, seven hundred twenty-six thousand, two hundred sixty-six".