20225042 has 4 divisors (see below), whose sum is σ = 30337566. Its totient is φ = 10112520.

The previous prime is 20225041. The next prime is 20225047. The reversal of 20225042 is 24052202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24052202 = 2 ⋅12026101.

It can be written as a sum of positive squares in only one way, i.e., 10182481 + 10042561 = 3191^2 + 3169^2 .

It is a super-3 number, since 3×20225042³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20225042.

It is not an unprimeable number, because it can be changed into a prime (20225041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5056259 + ... + 5056262.

Almost surely, 2^20225042 is an apocalyptic number.

20225042 is a deficient number, since it is larger than the sum of its proper divisors (10112524).

20225042 is a wasteful number, since it uses less digits than its factorization.

20225042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112523.

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

The square root of 20225042 is about 4497.2260339013. The cubic root of 20225042 is about 272.4560633929.

Adding to 20225042 its reverse (24052202), we get a palindrome (44277244).

The spelling of 20225042 in words is "twenty million, two hundred twenty-five thousand, forty-two".