18867648 has 28 divisors (see below), whose sum is σ = 49921160. Its totient is φ = 6289152.

The previous prime is 18867647. The next prime is 18867677. The reversal of 18867648 is 84676881.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 18867597 and 18867606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48943 + ... + 49326.

Almost surely, 2^18867648 is an apocalyptic number.

It is an amenable number.

18867648 is an abundant number, since it is smaller than the sum of its proper divisors (31053512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18867648 is an equidigital number, since it uses as much as digits as its factorization.

18867648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98284 (or 98274 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 18867648 is about 4343.6905967161. The cubic root of 18867648 is about 266.2191271042.

The spelling of 18867648 in words is "eighteen million, eight hundred sixty-seven thousand, six hundred forty-eight".