18620506 has 8 divisors (see below), whose sum is σ = 28347840. Its totient is φ = 9171228.

The previous prime is 18620489. The next prime is 18620521. The reversal of 18620506 is 60502681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69346 + ... + 69613.

It is an arithmetic number, because the mean of its divisors is an integer number (3543480).

Almost surely, 2^18620506 is an apocalyptic number.

18620506 is a deficient number, since it is larger than the sum of its proper divisors (9727334).

18620506 is a wasteful number, since it uses less digits than its factorization.

18620506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139028.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 18620506 is about 4315.1484331365. The cubic root of 18620506 is about 265.0516382105.

The spelling of 18620506 in words is "eighteen million, six hundred twenty thousand, five hundred six".