40019818 has 8 divisors (see below), whose sum is σ = 61047360. Its totient is φ = 19670700.

The previous prime is 40019809. The next prime is 40019821. The reversal of 40019818 is 81891004.

40019818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40019818.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 169458 + ... + 169693.

It is an arithmetic number, because the mean of its divisors is an integer number (7630920).

Almost surely, 2^40019818 is an apocalyptic number.

40019818 is a deficient number, since it is larger than the sum of its proper divisors (21027542).

40019818 is a wasteful number, since it uses less digits than its factorization.

40019818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339212.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 40019818 is about 6326.1218767899. The cubic root of 40019818 is about 342.0516605157.

The spelling of 40019818 in words is "forty million, nineteen thousand, eight hundred eighteen".