20100242 has 8 divisors (see below), whose sum is σ = 30575232. Its totient is φ = 9908500.

The previous prime is 20100217. The next prime is 20100251. The reversal of 20100242 is 24200102.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70634 + ... + 70917.

It is an arithmetic number, because the mean of its divisors is an integer number (3821904).

Almost surely, 2^20100242 is an apocalyptic number.

20100242 is a deficient number, since it is larger than the sum of its proper divisors (10474990).

20100242 is a wasteful number, since it uses less digits than its factorization.

20100242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141624.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20100242 is about 4483.3293432448. The cubic root of 20100242 is about 271.8945038547.

Adding to 20100242 its reverse (24200102), we get a palindrome (44300344).

The spelling of 20100242 in words is "twenty million, one hundred thousand, two hundred forty-two".