20042242 has 8 divisors (see below), whose sum is σ = 32796432. Its totient is φ = 9110100.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042242 is 24224002.

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

It is not an unprimeable number, because it can be changed into a prime (20042249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455484 + ... + 455527.

It is an arithmetic number, because the mean of its divisors is an integer number (4099554).

Almost surely, 2^20042242 is an apocalyptic number.

20042242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20042242 is a deficient number, since it is larger than the sum of its proper divisors (12754190).

20042242 is a wasteful number, since it uses less digits than its factorization.

20042242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911024.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20042242 is about 4476.8562630489. The cubic root of 20042242 is about 271.6327313218.

Adding to 20042242 its reverse (24224002), we get a palindrome (44266244).

The spelling of 20042242 in words is "twenty million, forty-two thousand, two hundred forty-two".