18486506 has 32 divisors (see below), whose sum is σ = 30404160. Its totient is φ = 8401536.

The previous prime is 18486499. The next prime is 18486521. The reversal of 18486506 is 60568481.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 18486506.

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 15 ways as a sum of consecutive naturals, for example, 134870 + ... + 135006.

It is an arithmetic number, because the mean of its divisors is an integer number (950130).

Almost surely, 2^18486506 is an apocalyptic number.

18486506 is a deficient number, since it is larger than the sum of its proper divisors (11917654).

18486506 is a wasteful number, since it uses less digits than its factorization.

18486506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18486506 is about 4299.5937017351. The cubic root of 18486506 is about 264.4143039479.

The spelling of 18486506 in words is "eighteen million, four hundred eighty-six thousand, five hundred six".