20670266 has 16 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 9648576.

The previous prime is 20670263. The next prime is 20670311. The reversal of 20670266 is 66207602.

It is not an unprimeable number, because it can be changed into a prime (20670263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 6711.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^20670266 is an apocalyptic number.

20670266 is a deficient number, since it is larger than the sum of its proper divisors (12424390).

20670266 is a wasteful number, since it uses less digits than its factorization.

20670266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20670266 is about 4546.4564223140. The cubic root of 20670266 is about 274.4408074951.

Adding to 20670266 its reverse (66207602), we get a palindrome (86877868).

The spelling of 20670266 in words is "twenty million, six hundred seventy thousand, two hundred sixty-six".