4020018 has 16 divisors (see below), whose sum is σ = 8299776. Its totient is φ = 1296720.

The previous prime is 4020017. The next prime is 4020031. The reversal of 4020018 is 8100204.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4019979 and 4020006.

It is not an unprimeable number, because it can be changed into a prime (4020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10621 + ... + 10992.

It is an arithmetic number, because the mean of its divisors is an integer number (518736).

Almost surely, 2^4020018 is an apocalyptic number.

4020018 is an abundant number, since it is smaller than the sum of its proper divisors (4279758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4020018 is a wasteful number, since it uses less digits than its factorization.

4020018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21649.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4020018 is about 2004.9982543633. The cubic root of 4020018 is about 159.0044696343.

The spelling of 4020018 in words is "four million, twenty thousand, eighteen".