18648243 has 12 divisors (see below), whose sum is σ = 27143688. Its totient is φ = 12336480.

The previous prime is 18648241. The next prime is 18648263. The reversal of 18648243 is 34284681.

18648243 is a `hidden beast` number, since 1 + 8 + 648 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 18648243 - 2¹ = 18648241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18648198 and 18648207.

It is not an unprimeable number, because it can be changed into a prime (18648241) 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, 6730 + ... + 9087.

It is an arithmetic number, because the mean of its divisors is an integer number (2261974).

Almost surely, 2^18648243 is an apocalyptic number.

18648243 is a deficient number, since it is larger than the sum of its proper divisors (8495445).

18648243 is a wasteful number, since it uses less digits than its factorization.

18648243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15954 (or 15951 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18648243 is about 4318.3611474725. The cubic root of 18648243 is about 265.1831793895.

The spelling of 18648243 in words is "eighteen million, six hundred forty-eight thousand, two hundred forty-three".