218424020 has 24 divisors (see below), whose sum is σ = 465539424. Its totient is φ = 86065056.

The previous prime is 218424001. The next prime is 218424049. The reversal of 218424020 is 20424812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80162 + ... + 82841.

It is an arithmetic number, because the mean of its divisors is an integer number (19397476).

Almost surely, 2^218424020 is an apocalyptic number.

218424020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218424020 is an abundant number, since it is smaller than the sum of its proper divisors (247115404).

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

218424020 is a wasteful number, since it uses less digits than its factorization.

218424020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163079 (or 163077 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 218424020 is about 14779.1752137932. The cubic root of 218424020 is about 602.2361188972.

Adding to 218424020 its reverse (20424812), we get a palindrome (238848832).

The spelling of 218424020 in words is "two hundred eighteen million, four hundred twenty-four thousand, twenty".