20243818 has 16 divisors (see below), whose sum is σ = 36213120. Its totient is φ = 8298576.

The previous prime is 20243809. The next prime is 20243819. The reversal of 20243818 is 81834202.

It is not an unprimeable number, because it can be changed into a prime (20243819) 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, 31113 + ... + 31756.

It is an arithmetic number, because the mean of its divisors is an integer number (2263320).

Almost surely, 2^20243818 is an apocalyptic number.

20243818 is a deficient number, since it is larger than the sum of its proper divisors (15969302).

20243818 is a wasteful number, since it uses less digits than its factorization.

20243818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62901.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20243818 is about 4499.3130586791. The cubic root of 20243818 is about 272.5403492141.

The spelling of 20243818 in words is "twenty million, two hundred forty-three thousand, eight hundred eighteen".