20012242 has 4 divisors (see below), whose sum is σ = 30018366. Its totient is φ = 10006120.

The previous prime is 20012219. The next prime is 20012261. The reversal of 20012242 is 24221002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16329681 + 3682561 = 4041^2 + 1919^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003059 + ... + 5003062.

Almost surely, 2^20012242 is an apocalyptic number.

20012242 is a deficient number, since it is larger than the sum of its proper divisors (10006124).

20012242 is a wasteful number, since it uses less digits than its factorization.

20012242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006123.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20012242 is about 4473.5044428278. The cubic root of 20012242 is about 271.4971335308.

Adding to 20012242 its reverse (24221002), we get a palindrome (44233244).

The spelling of 20012242 in words is "twenty million, twelve thousand, two hundred forty-two".