40020040042 has 8 divisors (see below), whose sum is σ = 60055258176. Its totient is φ = 20001620652.

The previous prime is 40020040037. The next prime is 40020040057. The reversal of 40020040042 is 24004002004.

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 = 40020039998 and 40020040025.

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, 4193728 + ... + 4203259.

It is an arithmetic number, because the mean of its divisors is an integer number (7506907272).

Almost surely, 2^40020040042 is an apocalyptic number.

40020040042 is a deficient number, since it is larger than the sum of its proper divisors (20035218134).

40020040042 is a wasteful number, since it uses less digits than its factorization.

40020040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8399372.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40020040042 its reverse (24004002004), we get a palindrome (64024042046).

The spelling of 40020040042 in words is "forty billion, twenty million, forty thousand, forty-two".