18587241 has 12 divisors (see below), whose sum is σ = 26886132. Its totient is φ = 12374016.

The previous prime is 18587221. The next prime is 18587279. The reversal of 18587241 is 14278581.

It can be written as a sum of positive squares in 2 ways, for example, as 13111641 + 5475600 = 3621^2 + 2340^2 .

It is not a de Polignac number, because 18587241 - 2¹⁴ = 18570857 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18587196 and 18587205.

It is not an unprimeable number, because it can be changed into a prime (18587221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10105 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (2240511).

Almost surely, 2^18587241 is an apocalyptic number.

It is an amenable number.

18587241 is a deficient number, since it is larger than the sum of its proper divisors (8298891).

18587241 is a wasteful number, since it uses less digits than its factorization.

18587241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920 (or 2917 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 18587241 is about 4311.2922656670. The cubic root of 18587241 is about 264.8937084104.

The spelling of 18587241 in words is "eighteen million, five hundred eighty-seven thousand, two hundred forty-one".