20431270042 has 8 divisors (see below), whose sum is σ = 30649284000. Its totient is φ = 10214842044.

The previous prime is 20431270007. The next prime is 20431270049. The reversal of 20431270042 is 24007213402.

It is a happy number.

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 = 20431269989 and 20431270016.

It is not an unprimeable number, because it can be changed into a prime (20431270049) 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, 363742 + ... + 416137.

It is an arithmetic number, because the mean of its divisors is an integer number (3831160500).

Almost surely, 2^20431270042 is an apocalyptic number.

20431270042 is a deficient number, since it is larger than the sum of its proper divisors (10218013958).

20431270042 is a wasteful number, since it uses less digits than its factorization.

20431270042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792980.

The product of its (nonzero) digits is 2688, while the sum is 25.

Adding to 20431270042 its reverse (24007213402), we get a palindrome (44438483444).

The spelling of 20431270042 in words is "twenty billion, four hundred thirty-one million, two hundred seventy thousand, forty-two".