216602020 has 12 divisors (see below), whose sum is σ = 454864284. Its totient is φ = 86640800.

The previous prime is 216602011. The next prime is 216602021. The reversal of 216602020 is 20206612.

It can be written as a sum of positive squares in 2 ways, for example, as 98922916 + 117679104 = 9946^2 + 10848^2 .

It is not an unprimeable number, because it can be changed into a prime (216602021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5415031 + ... + 5415070.

It is an arithmetic number, because the mean of its divisors is an integer number (37905357).

Almost surely, 2^216602020 is an apocalyptic number.

216602020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216602020 is an abundant number, since it is smaller than the sum of its proper divisors (238262264).

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

216602020 is a wasteful number, since it uses less digits than its factorization.

216602020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10830110 (or 10830108 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 216602020 is about 14717.4053419752. The cubic root of 216602020 is about 600.5569088535.

Adding to 216602020 its reverse (20206612), we get a palindrome (236808632).

The spelling of 216602020 in words is "two hundred sixteen million, six hundred two thousand, twenty".