4020918 has 16 divisors (see below), whose sum is σ = 8773056. Its totient is φ = 1218440.

The previous prime is 4020889. The next prime is 4020923. The reversal of 4020918 is 8190204.

It is a Curzon number.

It is a congruent number.

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, 30396 + ... + 30527.

It is an arithmetic number, because the mean of its divisors is an integer number (548316).

Almost surely, 2^4020918 is an apocalyptic number.

4020918 is an abundant number, since it is smaller than the sum of its proper divisors (4752138).

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

4020918 is a wasteful number, since it uses less digits than its factorization.

4020918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60939.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4020918 is about 2005.2226809011. Note that the first 3 decimals coincide. The cubic root of 4020918 is about 159.0163347009.

The spelling of 4020918 in words is "four million, twenty thousand, nine hundred eighteen".