20318673 has 8 divisors (see below), whose sum is σ = 27535936. Its totient is φ = 13323600.

The previous prime is 20318659. The next prime is 20318681. The reversal of 20318673 is 37681302.

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

It is not a de Polignac number, because 20318673 - 2⁹ = 20318161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20318673.

It is not an unprimeable number, because it can be changed into a prime (20318173) by changing a digit.

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, 55333 + ... + 55698.

It is an arithmetic number, because the mean of its divisors is an integer number (3441992).

Almost surely, 2^20318673 is an apocalyptic number.

It is an amenable number.

20318673 is a deficient number, since it is larger than the sum of its proper divisors (7217263).

20318673 is a wasteful number, since it uses less digits than its factorization.

20318673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111095.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20318673 is about 4507.6238751697. The cubic root of 20318673 is about 272.8758576305.

Adding to 20318673 its reverse (37681302), we get a palindrome (57999975).

The spelling of 20318673 in words is "twenty million, three hundred eighteen thousand, six hundred seventy-three".