20303243220 has 48 divisors (see below), whose sum is σ = 61222089600. Its totient is φ = 4997721216.

The previous prime is 20303243209. The next prime is 20303243249. The reversal of 20303243220 is 2234230302.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13014120 + ... + 13015679.

It is an arithmetic number, because the mean of its divisors is an integer number (1275460200).

Almost surely, 2^20303243220 is an apocalyptic number.

20303243220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303243220 is an abundant number, since it is smaller than the sum of its proper divisors (40918846380).

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

20303243220 is a wasteful number, since it uses less digits than its factorization.

20303243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26029824 (or 26029822 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20303243220 its reverse (2234230302), we get a palindrome (22537473522).

The spelling of 20303243220 in words is "twenty billion, three hundred three million, two hundred forty-three thousand, two hundred twenty".