20031113042 has 4 divisors (see below), whose sum is σ = 30046669566. Its totient is φ = 10015556520.

The previous prime is 20031113041. The next prime is 20031113059. The reversal of 20031113042 is 24031113002.

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., 20004990721 + 26122321 = 141439^2 + 5111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20031113042.

It is not an unprimeable number, because it can be changed into a prime (20031113041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5007778259 + ... + 5007778262.

Almost surely, 2^20031113042 is an apocalyptic number.

20031113042 is a deficient number, since it is larger than the sum of its proper divisors (10015556524).

20031113042 is a wasteful number, since it uses less digits than its factorization.

20031113042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10015556523.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20031113042 its reverse (24031113002), we get a palindrome (44062226044).

The spelling of 20031113042 in words is "twenty billion, thirty-one million, one hundred thirteen thousand, forty-two".