18516028 has 6 divisors (see below), whose sum is σ = 32403056. Its totient is φ = 9258012.

The previous prime is 18516023. The next prime is 18516031. The reversal of 18516028 is 82061581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18516023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2314500 + ... + 2314507.

Almost surely, 2^18516028 is an apocalyptic number.

It is an amenable number.

18516028 is a deficient number, since it is larger than the sum of its proper divisors (13887028).

18516028 is a wasteful number, since it uses less digits than its factorization.

18516028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629011 (or 4629009 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 18516028 is about 4303.0254472871. The cubic root of 18516028 is about 264.5549811078.

The spelling of 18516028 in words is "eighteen million, five hundred sixteen thousand, twenty-eight".