218044020 has 48 divisors (see below), whose sum is σ = 611210880. Its totient is φ = 58079616.

The previous prime is 218043983. The next prime is 218044031. The reversal of 218044020 is 20440812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76786 + ... + 79574.

It is an arithmetic number, because the mean of its divisors is an integer number (12733560).

Almost surely, 2^218044020 is an apocalyptic number.

218044020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218044020 is an abundant number, since it is smaller than the sum of its proper divisors (393166860).

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

218044020 is a wasteful number, since it uses less digits than its factorization.

218044020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104 (or 4102 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 218044020 is about 14766.3136902884. The cubic root of 218044020 is about 601.8866723387.

Adding to 218044020 its reverse (20440812), we get a palindrome (238484832).

The spelling of 218044020 in words is "two hundred eighteen million, forty-four thousand, twenty".