20244666 has 16 divisors (see below), whose sum is σ = 43604064. Its totient is φ = 6229104.

The previous prime is 20244647. The next prime is 20244667. The reversal of 20244666 is 66644202.

It is not an unprimeable number, because it can be changed into a prime (20244667) 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 7 ways as a sum of consecutive naturals, for example, 129696 + ... + 129851.

It is an arithmetic number, because the mean of its divisors is an integer number (2725254).

Almost surely, 2^20244666 is an apocalyptic number.

20244666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20244666 is an abundant number, since it is smaller than the sum of its proper divisors (23359398).

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

20244666 is a wasteful number, since it uses less digits than its factorization.

20244666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259565.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20244666 is about 4499.4072943000. The cubic root of 20244666 is about 272.5441546720.

Adding to 20244666 its reverse (66644202), we get a palindrome (86888868).

It can be divided in two parts, 20244 and 666, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20244666 in words is "twenty million, two hundred forty-four thousand, six hundred sixty-six".