18236541 has 8 divisors (see below), whose sum is σ = 24337984. Its totient is φ = 12146400.

The previous prime is 18236527. The next prime is 18236549. The reversal of 18236541 is 14563281.

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

It is not a de Polignac number, because 18236541 - 2⁵ = 18236509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18236499 and 18236508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236549) 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, 2241 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (3042248).

Almost surely, 2^18236541 is an apocalyptic number.

It is an amenable number.

18236541 is a deficient number, since it is larger than the sum of its proper divisors (6101443).

18236541 is a wasteful number, since it uses less digits than its factorization.

18236541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651.

The product of its digits is 5760, while the sum is 30.

The square root of 18236541 is about 4270.4263253216. The cubic root of 18236541 is about 263.2171338350.

The spelling of 18236541 in words is "eighteen million, two hundred thirty-six thousand, five hundred forty-one".