18668548 has 24 divisors (see below), whose sum is σ = 34372800. Its totient is φ = 8854560.

The previous prime is 18668513. The next prime is 18668549. The reversal of 18668548 is 84586681.

18668548 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 18668498 and 18668507.

It is not an unprimeable number, because it can be changed into a prime (18668549) 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, 11278 + ... + 12826.

It is an arithmetic number, because the mean of its divisors is an integer number (1432200).

Almost surely, 2^18668548 is an apocalyptic number.

It is an amenable number.

18668548 is a deficient number, since it is larger than the sum of its proper divisors (15704252).

18668548 is a wasteful number, since it uses less digits than its factorization.

18668548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1705 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 18668548 is about 4320.7115154798. The cubic root of 18668548 is about 265.2793920520.

The spelling of 18668548 in words is "eighteen million, six hundred sixty-eight thousand, five hundred forty-eight".