20305118 has 8 divisors (see below), whose sum is σ = 30554712. Its totient is φ = 10120216.

The previous prime is 20305097. The next prime is 20305151. The reversal of 20305118 is 81150302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20305118.

It is a congruent number.

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, 15380 + ... + 16647.

It is an arithmetic number, because the mean of its divisors is an integer number (3819339).

Almost surely, 2^20305118 is an apocalyptic number.

20305118 is a deficient number, since it is larger than the sum of its proper divisors (10249594).

20305118 is a wasteful number, since it uses less digits than its factorization.

20305118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32346.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 20305118 is about 4506.1200605399. The cubic root of 20305118 is about 272.8151637870.

The spelling of 20305118 in words is "twenty million, three hundred five thousand, one hundred eighteen".