20450042 has 8 divisors (see below), whose sum is σ = 32289600. Its totient is φ = 9686844.

The previous prime is 20450041. The next prime is 20450051. The reversal of 20450042 is 24005402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20450042.

It is not an unprimeable number, because it can be changed into a prime (20450041) 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, 269042 + ... + 269117.

It is an arithmetic number, because the mean of its divisors is an integer number (4036200).

Almost surely, 2^20450042 is an apocalyptic number.

20450042 is a deficient number, since it is larger than the sum of its proper divisors (11839558).

20450042 is a wasteful number, since it uses less digits than its factorization.

20450042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538180.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20450042 is about 4522.1722656263. The cubic root of 20450042 is about 273.4626815253.

Adding to 20450042 its reverse (24005402), we get a palindrome (44455444).

The spelling of 20450042 in words is "twenty million, four hundred fifty thousand, forty-two".