20026666 has 16 divisors (see below), whose sum is σ = 33310368. Its totient is φ = 8953200.

The previous prime is 20026639. The next prime is 20026673. The reversal of 20026666 is 66662002.

20026666 is a modest number, since divided by 6666 gives 2002 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6120 + ... + 8803.

It is an arithmetic number, because the mean of its divisors is an integer number (2081898).

Almost surely, 2^20026666 is an apocalyptic number.

20026666 is a deficient number, since it is larger than the sum of its proper divisors (13283702).

20026666 is a wasteful number, since it uses less digits than its factorization.

20026666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14997.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20026666 is about 4475.1163113376. The cubic root of 20026666 is about 271.5623458507.

Adding to 20026666 its reverse (66662002), we get a palindrome (86688668).

It can be divided in two parts, 2002 and 6666, that added together give a palindrome (8668).

The spelling of 20026666 in words is "twenty million, twenty-six thousand, six hundred sixty-six".