2018720220 has 48 divisors (see below), whose sum is σ = 6166274688. Its totient is φ = 489386560.

The previous prime is 2018720203. The next prime is 2018720257. The reversal of 2018720220 is 220278102.

It is a happy number.

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, 1528674 + ... + 1529993.

It is an arithmetic number, because the mean of its divisors is an integer number (128464056).

Almost surely, 2^2018720220 is an apocalyptic number.

2018720220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2018720220 is an abundant number, since it is smaller than the sum of its proper divisors (4147554468).

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

2018720220 is a wasteful number, since it uses less digits than its factorization.

2018720220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058690 (or 3058688 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2018720220 is about 44930.1704871014. The cubic root of 2018720220 is about 1263.8398482867.

Adding to 2018720220 its reverse (220278102), we get a palindrome (2238998322).

The spelling of 2018720220 in words is "two billion, eighteen million, seven hundred twenty thousand, two hundred twenty".