42240420442 has 16 divisors (see below), whose sum is σ = 69195124800. Its totient is φ = 19179514240.

The previous prime is 42240420433. The next prime is 42240420491. The reversal of 42240420442 is 24402404224.

It is a self number, because there is not a number n which added to its sum of digits gives 42240420442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012942 + ... + 1053817.

It is an arithmetic number, because the mean of its divisors is an integer number (4324695300).

Almost surely, 2^42240420442 is an apocalyptic number.

42240420442 is a deficient number, since it is larger than the sum of its proper divisors (26954704358).

42240420442 is a wasteful number, since it uses less digits than its factorization.

42240420442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067701.

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

Adding to 42240420442 its reverse (24402404224), we get a palindrome (66642824666).

The spelling of 42240420442 in words is "forty-two billion, two hundred forty million, four hundred twenty thousand, four hundred forty-two".