18506828 has 6 divisors (see below), whose sum is σ = 32386956. Its totient is φ = 9253412.

The previous prime is 18506791. The next prime is 18506833. The reversal of 18506828 is 82860581.

It is a junction number, because it is equal to n+sod(n) for n = 18506791 and 18506800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2313350 + ... + 2313357.

It is an arithmetic number, because the mean of its divisors is an integer number (5397826).

Almost surely, 2^18506828 is an apocalyptic number.

It is an amenable number.

18506828 is a deficient number, since it is larger than the sum of its proper divisors (13880128).

18506828 is a wasteful number, since it uses less digits than its factorization.

18506828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626711 (or 4626709 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 18506828 is about 4301.9562991737. The cubic root of 18506828 is about 264.5111576513.

The spelling of 18506828 in words is "eighteen million, five hundred six thousand, eight hundred twenty-eight".