42118018 has 16 divisors (see below), whose sum is σ = 64209600. Its totient is φ = 20717136.

The previous prime is 42117997. The next prime is 42118019. The reversal of 42118018 is 81081124.

It is a junction number, because it is equal to n+sod(n) for n = 42117983 and 42118001.

It is not an unprimeable number, because it can be changed into a prime (42118019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57571 + ... + 58297.

It is an arithmetic number, because the mean of its divisors is an integer number (4013100).

Almost surely, 2^42118018 is an apocalyptic number.

42118018 is a deficient number, since it is larger than the sum of its proper divisors (22091582).

42118018 is a wasteful number, since it uses less digits than its factorization.

42118018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 42118018 is about 6489.8395974015. The cubic root of 42118018 is about 347.9279423185.

The spelling of 42118018 in words is "forty-two million, one hundred eighteen thousand, eighteen".