20218852 has 6 divisors (see below), whose sum is σ = 35382998. Its totient is φ = 10109424.

The previous prime is 20218843. The next prime is 20218859. The reversal of 20218852 is 25881202.

It can be written as a sum of positive squares in only one way, i.e., 12787776 + 7431076 = 3576^2 + 2726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20218852.

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 as a sum of consecutive naturals, namely, 2527353 + ... + 2527360.

Almost surely, 2^20218852 is an apocalyptic number.

It is an amenable number.

20218852 is a deficient number, since it is larger than the sum of its proper divisors (15164146).

20218852 is a wasteful number, since it uses less digits than its factorization.

20218852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5054717 (or 5054715 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20218852 is about 4496.5377792253. The cubic root of 20218852 is about 272.4282649320.

The spelling of 20218852 in words is "twenty million, two hundred eighteen thousand, eight hundred fifty-two".