42000022404442 has 8 divisors (see below), whose sum is σ = 64188713486196. Its totient is φ = 20603784575712.

The previous prime is 42000022404437. The next prime is 42000022404443. The reversal of 42000022404442 is 24440422000024.

It can be written as a sum of positive squares in 2 ways, for example, as 38780398666881 + 3219623737561 = 6227391^2 + 1794331^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 42000022404442.

It is not an unprimeable number, because it can be changed into a prime (42000022404443) 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, 198113313123 + ... + 198113313334.

Almost surely, 2^{42000022404442} is an apocalyptic number.

42000022404442 is a deficient number, since it is larger than the sum of its proper divisors (22188691081754).

42000022404442 is a wasteful number, since it uses less digits than its factorization.

42000022404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396226626512.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 42000022404442 its reverse (24440422000024), we get a palindrome (66440444404466).

The spelling of 42000022404442 in words is "forty-two trillion, twenty-two million, four hundred four thousand, four hundred forty-two".