20163318 has 32 divisors (see below), whose sum is σ = 48093696. Its totient is φ = 5510208.

The previous prime is 20163317. The next prime is 20163331. The reversal of 20163318 is 81336102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9471 + ... + 11402.

It is an arithmetic number, because the mean of its divisors is an integer number (1502928).

Almost surely, 2^20163318 is an apocalyptic number.

20163318 is an abundant number, since it is smaller than the sum of its proper divisors (27930378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20163318 is a wasteful number, since it uses less digits than its factorization.

20163318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20908.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20163318 is about 4490.3583375940. The cubic root of 20163318 is about 272.1786150212.

The spelling of 20163318 in words is "twenty million, one hundred sixty-three thousand, three hundred eighteen".