20315242042 has 8 divisors (see below), whose sum is σ = 30493278036. Its totient is φ = 10150816032.

The previous prime is 20315242033. The next prime is 20315242049. The reversal of 20315242042 is 24024251302.

It can be written as a sum of positive squares in 2 ways, for example, as 20186442241 + 128799801 = 142079^2 + 11349^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20315241998 and 20315242016.

It is not an unprimeable number, because it can be changed into a prime (20315242049) 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, 3398763 + ... + 3404734.

Almost surely, 2^20315242042 is an apocalyptic number.

20315242042 is a deficient number, since it is larger than the sum of its proper divisors (10178035994).

20315242042 is a wasteful number, since it uses less digits than its factorization.

20315242042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804992.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20315242042 its reverse (24024251302), we get a palindrome (44339493344).

The spelling of 20315242042 in words is "twenty billion, three hundred fifteen million, two hundred forty-two thousand, forty-two".