4004018891 has 4 divisors (see below), whose sum is σ = 4239549432. Its totient is φ = 3768488352.

The previous prime is 4004018881. The next prime is 4004018911. The reversal of 4004018891 is 1988104004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4004018891 - 2¹⁰ = 4004017867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4004018881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117765245 + ... + 117765278.

It is an arithmetic number, because the mean of its divisors is an integer number (1059887358).

Almost surely, 2^4004018891 is an apocalyptic number.

4004018891 is a deficient number, since it is larger than the sum of its proper divisors (235530541).

4004018891 is a wasteful number, since it uses less digits than its factorization.

4004018891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235530540.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 4004018891 is about 63277.3173499004. The cubic root of 4004018891 is about 1587.9325066698.

The spelling of 4004018891 in words is "four billion, four million, eighteen thousand, eight hundred ninety-one".