18648036 has 72 divisors (see below), whose sum is σ = 53178720. Its totient is φ = 5646960.

The previous prime is 18648013. The next prime is 18648059. The reversal of 18648036 is 63084681.

It is a happy number.

18648036 is a `hidden beast` number, since 1 + 8 + 648 + 0 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (18648013) and next prime (18648059).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12355 + ... + 13781.

Almost surely, 2^18648036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18648036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26589360).

18648036 is an abundant number, since it is smaller than the sum of its proper divisors (34530684).

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

18648036 is a wasteful number, since it uses less digits than its factorization.

18648036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18648036 is about 4318.3371799803. The cubic root of 18648036 is about 265.1821981867.

The spelling of 18648036 in words is "eighteen million, six hundred forty-eight thousand, thirty-six".