20022666 has 8 divisors (see below), whose sum is σ = 40045344. Its totient is φ = 6674220.

The previous prime is 20022631. The next prime is 20022677. The reversal of 20022666 is 66622002.

It is a sphenic number, since it is the product of 3 distinct primes.

20022666 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668550 + ... + 1668561.

It is an arithmetic number, because the mean of its divisors is an integer number (5005668).

Almost surely, 2^20022666 is an apocalyptic number.

20022666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20022666 is a wasteful number, since it uses less digits than its factorization.

20022666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337116.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20022666 is about 4474.6693732610. The cubic root of 20022666 is about 271.5442645965.

Adding to 20022666 its reverse (66622002), we get a palindrome (86644668).

The spelling of 20022666 in words is "twenty million, twenty-two thousand, six hundred sixty-six".