20218850 has 24 divisors (see below), whose sum is σ = 39588240. Its totient is φ = 7661520.

The previous prime is 20218843. The next prime is 20218859. The reversal of 20218850 is 5881202.

It is not an unprimeable number, because it can be changed into a prime (20218859) 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 11 ways as a sum of consecutive naturals, for example, 9692 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (1649510).

Almost surely, 2^20218850 is an apocalyptic number.

20218850 is a deficient number, since it is larger than the sum of its proper divisors (19369390).

20218850 is a wasteful number, since it uses less digits than its factorization.

20218850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21314 (or 21309 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 20218850 is about 4496.5375568319. The cubic root of 20218850 is about 272.4282559494.

The spelling of 20218850 in words is "twenty million, two hundred eighteen thousand, eight hundred fifty".