20318874 has 16 divisors (see below), whose sum is σ = 40772160. Its totient is φ = 6750560.

The previous prime is 20318873. The next prime is 20318887. The reversal of 20318874 is 47881302.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20318873) 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, 3579 + ... + 7310.

It is an arithmetic number, because the mean of its divisors is an integer number (2548260).

Almost surely, 2^20318874 is an apocalyptic number.

20318874 is an abundant number, since it is smaller than the sum of its proper divisors (20453286).

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

20318874 is a wasteful number, since it uses less digits than its factorization.

20318874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11205.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20318874 is about 4507.6461706749. The cubic root of 20318874 is about 272.8767574246.

The spelling of 20318874 in words is "twenty million, three hundred eighteen thousand, eight hundred seventy-four".