20228766 has 8 divisors (see below), whose sum is σ = 40457544. Its totient is φ = 6742920.

The previous prime is 20228743. The next prime is 20228777. The reversal of 20228766 is 66782202.

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

20228766 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1685725 + ... + 1685736.

It is an arithmetic number, because the mean of its divisors is an integer number (5057193).

Almost surely, 2^20228766 is an apocalyptic number.

20228766 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.

20228766 is a wasteful number, since it uses less digits than its factorization.

20228766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371466.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 20228766 is about 4497.6400478473. The cubic root of 20228766 is about 272.4727846456.

The spelling of 20228766 in words is "twenty million, two hundred twenty-eight thousand, seven hundred sixty-six".