20790242 has 16 divisors (see below), whose sum is σ = 34813152. Its totient is φ = 9229920.

The previous prime is 20790233. The next prime is 20790247. The reversal of 20790242 is 24209702.

It is not an unprimeable number, because it can be changed into a prime (20790247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10043 + ... + 11934.

It is an arithmetic number, because the mean of its divisors is an integer number (2175822).

Almost surely, 2^20790242 is an apocalyptic number.

20790242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20790242 is a deficient number, since it is larger than the sum of its proper divisors (14022910).

20790242 is a wasteful number, since it uses less digits than its factorization.

20790242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22033.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20790242 is about 4559.6317833790. The cubic root of 20790242 is about 274.9707605276.

Adding to 20790242 its reverse (24209702), we get a palindrome (44999944).

The spelling of 20790242 in words is "twenty million, seven hundred ninety thousand, two hundred forty-two".