18404941 has 8 divisors (see below), whose sum is σ = 18910584. Its totient is φ = 17902080.

The previous prime is 18404923. The next prime is 18404983. The reversal of 18404941 is 14940481.

It can be written as a sum of positive squares in 4 ways, for example, as 940900 + 17464041 = 970^2 + 4179^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18404941 - 2¹¹ = 18402893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18404921) 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, 23935 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (2363823).

Almost surely, 2^18404941 is an apocalyptic number.

It is an amenable number.

18404941 is a deficient number, since it is larger than the sum of its proper divisors (505643).

18404941 is an equidigital number, since it uses as much as digits as its factorization.

18404941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18404941 is about 4290.0980175283. The cubic root of 18404941 is about 264.0248532234.

It can be divided in two parts, 184049 and 41, that multiplied together give a square (7546009 = 2747²).

The spelling of 18404941 in words is "eighteen million, four hundred four thousand, nine hundred forty-one".