20216885 has 16 divisors (see below), whose sum is σ = 27264384. Its totient is φ = 14279232.

The previous prime is 20216869. The next prime is 20216921. The reversal of 20216885 is 58861202.

It is a cyclic number.

It is not a de Polignac number, because 20216885 - 2⁴ = 20216869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5267 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (1704024).

Almost surely, 2^20216885 is an apocalyptic number.

It is an amenable number.

20216885 is a deficient number, since it is larger than the sum of its proper divisors (7047499).

20216885 is a wasteful number, since it uses less digits than its factorization.

20216885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13564.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20216885 is about 4496.3190500675. The cubic root of 20216885 is about 272.4194302106.

The spelling of 20216885 in words is "twenty million, two hundred sixteen thousand, eight hundred eighty-five".