18380541 has 4 divisors (see below), whose sum is σ = 24507392. Its totient is φ = 12253692.

The previous prime is 18380539. The next prime is 18380563. The reversal of 18380541 is 14508381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18380541 - 2¹ = 18380539 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18380499 and 18380508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380591) 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, 3063421 + ... + 3063426.

It is an arithmetic number, because the mean of its divisors is an integer number (6126848).

Almost surely, 2^18380541 is an apocalyptic number.

It is an amenable number.

18380541 is a deficient number, since it is larger than the sum of its proper divisors (6126851).

18380541 is an equidigital number, since it uses as much as digits as its factorization.

18380541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126850.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18380541 is about 4287.2533165186. The cubic root of 18380541 is about 263.9081263185.

The spelling of 18380541 in words is "eighteen million, three hundred eighty thousand, five hundred forty-one".