20008242 has 32 divisors (see below), whose sum is σ = 45308160. Its totient is φ = 6542640.

The previous prime is 20008223. The next prime is 20008243. The reversal of 20008242 is 24280002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20008243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634 + ... + 6357.

It is an arithmetic number, because the mean of its divisors is an integer number (1415880).

Almost surely, 2^20008242 is an apocalyptic number.

20008242 is an abundant number, since it is smaller than the sum of its proper divisors (25299918).

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

20008242 is a wasteful number, since it uses less digits than its factorization.

20008242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055 (or 7049 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20008242 is about 4473.0573436968. The cubic root of 20008242 is about 271.4790435887.

Adding to 20008242 its reverse (24280002), we get a palindrome (44288244).

The spelling of 20008242 in words is "twenty million, eight thousand, two hundred forty-two".