18487648 has 12 divisors (see below), whose sum is σ = 36397620. Its totient is φ = 9243808.

The previous prime is 18487639. The next prime is 18487649. The reversal of 18487648 is 84678481.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18487598 and 18487607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18487649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288838 + ... + 288901.

It is an arithmetic number, because the mean of its divisors is an integer number (3033135).

Almost surely, 2^18487648 is an apocalyptic number.

It is an amenable number.

18487648 is a deficient number, since it is larger than the sum of its proper divisors (17909972).

18487648 is an equidigital number, since it uses as much as digits as its factorization.

18487648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577749 (or 577741 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 18487648 is about 4299.7265029302. The cubic root of 18487648 is about 264.4197485484.

The spelling of 18487648 in words is "eighteen million, four hundred eighty-seven thousand, six hundred forty-eight".