20284818220 has 24 divisors (see below), whose sum is σ = 42705435024. Its totient is φ = 8093486016.

The previous prime is 20284818199. The next prime is 20284818277. The reversal of 20284818220 is 2281848202.

It is a super-2 number, since 2×20284818220² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20284818220.

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, 1269442 + ... + 1285321.

It is an arithmetic number, because the mean of its divisors is an integer number (1779393126).

Almost surely, 2^20284818220 is an apocalyptic number.

20284818220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20284818220 is an abundant number, since it is smaller than the sum of its proper divisors (22420616804).

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

20284818220 is a wasteful number, since it uses less digits than its factorization.

20284818220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555169 (or 2555167 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 37.

It can be divided in two parts, 202848182 and 20, that added together give a palindrome (202848202).

The spelling of 20284818220 in words is "twenty billion, two hundred eighty-four million, eight hundred eighteen thousand, two hundred twenty".