20671366 has 16 divisors (see below), whose sum is σ = 31687200. Its totient is φ = 10111360.

The previous prime is 20671361. The next prime is 20671381. The reversal of 20671366 is 66317602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671361) 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, 20670 + ... + 21646.

It is an arithmetic number, because the mean of its divisors is an integer number (1980450).

Almost surely, 2^20671366 is an apocalyptic number.

20671366 is a deficient number, since it is larger than the sum of its proper divisors (11015834).

20671366 is a wasteful number, since it uses less digits than its factorization.

20671366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20671366 is about 4546.5773940405. The cubic root of 20671366 is about 274.4456756720.

Adding to 20671366 its reverse (66317602), we get a palindrome (86988968).

The spelling of 20671366 in words is "twenty million, six hundred seventy-one thousand, three hundred sixty-six".