18530541 has 6 divisors (see below), whose sum is σ = 26766350. Its totient is φ = 12353688.

The previous prime is 18530537. The next prime is 18530573. The reversal of 18530541 is 14503581.

It can be written as a sum of positive squares in only one way, i.e., 15093225 + 3437316 = 3885^2 + 1854^2 .

It is not a de Polignac number, because 18530541 - 2² = 18530537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1029466 + ... + 1029483.

Almost surely, 2^18530541 is an apocalyptic number.

It is an amenable number.

18530541 is a deficient number, since it is larger than the sum of its proper divisors (8235809).

18530541 is a wasteful number, since it uses less digits than its factorization.

18530541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058955 (or 2058952 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18530541 is about 4304.7114885901. The cubic root of 18530541 is about 264.6240831085.

The spelling of 18530541 in words is "eighteen million, five hundred thirty thousand, five hundred forty-one".