20303042220 has 144 divisors (see below), whose sum is σ = 62752408992. Its totient is φ = 5312563200.

The previous prime is 20303042171. The next prime is 20303042231. The reversal of 20303042220 is 2224030302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20303042193 and 20303042202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2049399 + ... + 2059281.

It is an arithmetic number, because the mean of its divisors is an integer number (435780618).

Almost surely, 2^20303042220 is an apocalyptic number.

20303042220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20303042220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31376204496).

20303042220 is an abundant number, since it is smaller than the sum of its proper divisors (42449366772).

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

20303042220 is a wasteful number, since it uses less digits than its factorization.

20303042220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112 (or 10107 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20303042220 its reverse (2224030302), we get a palindrome (22527072522).

The spelling of 20303042220 in words is "twenty billion, three hundred three million, forty-two thousand, two hundred twenty".