18499118 has 16 divisors (see below), whose sum is σ = 31011120. Its totient is φ = 8203200.

The previous prime is 18499099. The next prime is 18499127. The reversal of 18499118 is 81199481.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9353 + ... + 11156.

It is an arithmetic number, because the mean of its divisors is an integer number (1938195).

Almost surely, 2^18499118 is an apocalyptic number.

18499118 is a deficient number, since it is larger than the sum of its proper divisors (12512002).

18499118 is a wasteful number, since it uses less digits than its factorization.

18499118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20563.

The product of its digits is 20736, while the sum is 41.

The square root of 18499118 is about 4301.0601018819. The cubic root of 18499118 is about 264.4744205022.

The spelling of 18499118 in words is "eighteen million, four hundred ninety-nine thousand, one hundred eighteen".