218020 has 24 divisors (see below), whose sum is σ = 499968. Its totient is φ = 79200.

The previous prime is 218003. The next prime is 218021. The reversal of 218020 is 20812.

218020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (20832).

2²¹⁸⁰²⁰ is an apocalyptic number.

218020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218020 is an abundant number, since it is smaller than the sum of its proper divisors (281948).

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

218020 is a wasteful number, since it uses less digits than its factorization.

218020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 218020 is about 466.9261183528. The cubic root of 218020 is about 60.1864569999.

Adding to 218020 its reverse (20812), we get a palindrome (238832).

The spelling of 218020 in words is "two hundred eighteen thousand, twenty".