18518328 has 32 divisors (see below), whose sum is σ = 51440400. Its totient is φ = 6172704.

The previous prime is 18518309. The next prime is 18518341. The reversal of 18518328 is 82381581.

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

It is a junction number, because it is equal to n+sod(n) for n = 18518292 and 18518301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42651 + ... + 43082.

Almost surely, 2^18518328 is an apocalyptic number.

18518328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18518328 is an abundant number, since it is smaller than the sum of its proper divisors (32922072).

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

18518328 is a wasteful number, since it uses less digits than its factorization.

18518328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85748 (or 85738 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 18518328 is about 4303.2926928109. The cubic root of 18518328 is about 264.5659347037.

It can be divided in two parts, 1851 and 8328, that multiplied together give a triangular number (15415128 = T₅₅₅₂).

The spelling of 18518328 in words is "eighteen million, five hundred eighteen thousand, three hundred twenty-eight".