20243766 has 8 divisors (see below), whose sum is σ = 40487544. Its totient is φ = 6747920.

The previous prime is 20243747. The next prime is 20243767. The reversal of 20243766 is 66734202.

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

20243766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243767) by changing a digit.

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, 1686975 + ... + 1686986.

It is an arithmetic number, because the mean of its divisors is an integer number (5060943).

Almost surely, 2^20243766 is an apocalyptic number.

20243766 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.

20243766 is a wasteful number, since it uses less digits than its factorization.

20243766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373966.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 20243766 is about 4499.3072800154. The cubic root of 20243766 is about 272.5401158571.

Adding to 20243766 its reverse (66734202), we get a palindrome (86977968).

The spelling of 20243766 in words is "twenty million, two hundred forty-three thousand, seven hundred sixty-six".