18905041 has 4 divisors (see below), whose sum is σ = 19043172. Its totient is φ = 18766912.

The previous prime is 18905027. The next prime is 18905053. The reversal of 18905041 is 14050981.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3920400 + 14984641 = 1980^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 18905041 - 2⁷ = 18904913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18905021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68860 + ... + 69133.

It is an arithmetic number, because the mean of its divisors is an integer number (4760793).

Almost surely, 2^18905041 is an apocalyptic number.

It is an amenable number.

18905041 is a deficient number, since it is larger than the sum of its proper divisors (138131).

18905041 is a wasteful number, since it uses less digits than its factorization.

18905041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138130.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18905041 is about 4347.9927552838. The cubic root of 18905041 is about 266.3948805555.

The spelling of 18905041 in words is "eighteen million, nine hundred five thousand, forty-one".