20424440042 has 8 divisors (see below), whose sum is σ = 30645221376. Its totient is φ = 10209366252.

The previous prime is 20424440027. The next prime is 20424440077. The reversal of 20424440042 is 24004442402.

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 = 20424439993 and 20424440020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417928 + ... + 1432259.

It is an arithmetic number, because the mean of its divisors is an integer number (3830652672).

Almost surely, 2^20424440042 is an apocalyptic number.

20424440042 is a deficient number, since it is larger than the sum of its proper divisors (10220781334).

20424440042 is a wasteful number, since it uses less digits than its factorization.

20424440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853772.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20424440042 its reverse (24004442402), we get a palindrome (44428882444).

The spelling of 20424440042 in words is "twenty billion, four hundred twenty-four million, four hundred forty thousand, forty-two".