18673128 has 48 divisors (see below), whose sum is σ = 50843520. Its totient is φ = 6191136.

The previous prime is 18673103. The next prime is 18673139. The reversal of 18673128 is 82137681.

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 = 18673092 and 18673101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15475 + ... + 16637.

It is an arithmetic number, because the mean of its divisors is an integer number (1059240).

Almost surely, 2^18673128 is an apocalyptic number.

18673128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18673128 is an abundant number, since it is smaller than the sum of its proper divisors (32170392).

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

18673128 is a wasteful number, since it uses less digits than its factorization.

18673128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1391 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18673128 is about 4321.2414882763. The cubic root of 18673128 is about 265.3010841563.

The spelling of 18673128 in words is "eighteen million, six hundred seventy-three thousand, one hundred twenty-eight".